1
|
Lee YD, Yokoi T, Nakazawa T. A pollinator crisis can decrease plant abundance despite pollinators being herbivores at the larval stage. Sci Rep 2024; 14:18523. [PMID: 39122794 PMCID: PMC11316071 DOI: 10.1038/s41598-024-69537-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 08/06/2024] [Indexed: 08/12/2024] Open
Abstract
Pollinating insects are decreasing worldwide due to various environmental stresses (so-called pollinator crisis), raising concerns that plant productivity could be undermined in natural and agricultural ecosystems. To date, however, few studies have reported a concurrent decline in both pollinators and plants, and little is known about when a "plant crisis" occurs. Here, we propose that anthropogenic environmental stresses on pollinating insects (e.g. climate change, habitat loss, and pesticide usage) can negatively affect herbivorous insects (e.g., pollinator larvae and crop pests) as well, and effects of pollinator declines may be masked by positive effects of herbivore declines. To test the idea, we theoretically investigated plant population dynamics mediated by two insect groups: one representing a pollinator that is mutualistic at the adult stage but antagonistic at the larval stage, and the other representing a non-structured pest herbivore. Our model revealed that environmental stresses (increasing insect mortality) can have counterintuitive effects on plants. Nonetheless, plant abundance generally decreases with decreasing pollinator abundance, especially when plant populations grow slowly without pollinators, when pollinators are effective mutualists, or when pollinators are susceptible to environmental stresses. These findings offer a theoretical basis for assessing the pollinator crisis for biodiversity conservation and agricultural management.
Collapse
Affiliation(s)
- Yi-De Lee
- Department of Physics, National Cheng Kung University, Tainan City, Taiwan
| | - Tomoyuki Yokoi
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Takefumi Nakazawa
- Department of Life Sciences, National Cheng Kung University, No.1, University Road, 701, Tainan City, Taiwan.
| |
Collapse
|
2
|
Bernauer OM, Branstetter MG, Cook JM, Tierney SM. Functional trait mismatch between native and introduced bee pollinators servicing a global fruit crop. BMC Ecol Evol 2024; 24:104. [PMID: 39095704 PMCID: PMC11295329 DOI: 10.1186/s12862-024-02293-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 07/23/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND Understanding connections between biodiversity and ecosystem services can be enhanced by shifting focus from species richness to functional trait-based approaches, that when paired with comparative phylogenetic methods can provide even deeper insights. We investigated the functional ecology and phylogenetic diversity of pollination services provided by hymenopteran insects visiting apple flowers in orchards surrounded by either 'natural' or 'disturbed' landscapes in New South Wales, Australia. We assessed whether morphological and behavioural traits (hairiness, body size, glossa length, pollen load purity, and probability of loose pollen) exhibited non-random phylogenetic patterns. Then, explored whether bees, the primary pollinators in this system, filled unique or overlapping functional entities (FEs). For each landscape, we calculated phylogenetic diversity and used FEs to assess functional richness, evenness, and diversion. RESULTS A phylogenomic matrix based on ultraconserved elements (UCEs; 1,382,620 bp from 1,969 loci) was used to infer a fully-resolved and well-supported maximum likelihood phylogeny for 48 hymenopteran morphospecies. There was no significant difference in species richness between landscape categories. Pollinator communities at natural sites had higher phylogenetic complexity (X = 2.37) and functional divergence (x̄ = 0.74 ± 0.02 s.e.) than disturbed sites (X = 1.65 and x̄ = 0.6 ± 0.01 s.e.). Hairiness showed significant phylogenetic clustering (K = 0.94), whereas body size, glossa length, and loose pollen showed weaker non-random phylogenetic patterns (K between 0.3-0.5). Pollen load purity showed no association with phylogeny. The assemblage of 17 bee morphospecies comprised nine FEs: eight FEs consisted of native bees with three containing 65% of all native bee taxa. The introduced honey bee (Apis mellifera) occupied a unique FE, likely due to its different evolutionary history. Both landscape types supported six FEs each with three overlapping: two native bee FEs and the honey bee FE. CONCLUSIONS Bee hairiness was the only functional trait to exhibit demonstrable phylogenetic signal. Despite differences in species richness, and functional and phylogenetic diversity between orchard landscape types, both maintained equal bee FE numbers. While no native bee taxon was analogous to the honey bee FE, four native bee FEs shared the same hairiness level as honey bees. Health threats to honey bee populations in Australia will likely disrupt pollination services to apple, and other pollination-dependent food crops, given the low level of functional redundancy within the investigated pollinator assemblages.
Collapse
Affiliation(s)
- Olivia M Bernauer
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.
- Department of Entomology, University of Wisconsin-Madison, 1630 Linden Dr. Madison, Madison, WI, 53706, USA.
| | - Michael G Branstetter
- U.S. Department of Agriculture, Agricultural Research Service, Pollinating Insects Research Unit, Utah State University, 5310 Old Main Hill, Logan, UT, 84322, USA
| | - James M Cook
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Simon M Tierney
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| |
Collapse
|
3
|
Tscharntke T, Batáry P, Grass I. Mixing on- and off-field measures for biodiversity conservation. Trends Ecol Evol 2024; 39:726-733. [PMID: 38705769 DOI: 10.1016/j.tree.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 04/04/2024] [Accepted: 04/09/2024] [Indexed: 05/07/2024]
Abstract
The continuing biodiversity losses through agricultural expansion and intensification are dramatic. We argue that a mix of on- and off-field measures is needed, overcoming the false dichotomy of the land sharing-sparing debate. Protected land is essential for global biodiversity, while spillover between farmed and natural land is key to reducing species extinctions. This is particularly effective in landscapes with small and diversified fields. Focusing only on protected land fails to conserve a wealth of species, which often provide major ecosystem services such as pest control, pollination, and cultural benefits. On-field measures must minimise yield losses to prevent increased demand for food imports from biodiversity-rich regions, requiring enforcement of high social-ecological land-use standards to ensure a good life for all.
Collapse
Affiliation(s)
| | - Péter Batáry
- "Lendület" Landscape and Conservation Ecology, Institute of Ecology and Botany, HUN-REN Centre for Ecological Research, Vácrátót, Hungary; Faunistics and Wildlife Conservation, Department of Agriculture, Ecotrophology, and Landscape Development, Anhalt University of Applied Sciences, Bernburg, Germany
| | - Ingo Grass
- Ecology of Tropical Agricultural Systems, University of Hohenheim, Stuttgart, Germany; Center for Biodiversity and Integrative Taxonomy (KomBioTa), University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
4
|
Wang X, Fu X, Shi M, Xue C, Yang J, Zhao Z, Li S, Tu T. Multiple interaction networks reveal that Lepidoptera larvae and adults prefer various host plants for diet and pollination. Integr Zool 2024; 19:763-776. [PMID: 37427545 DOI: 10.1111/1749-4877.12745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
Plant-Lepidoptera interactions are often studied using the pollination or herbivore networks only. Lepidoptera species are involved in two types of plant-insect interactions because they are herbivores as larvae and pollinators as adults. The study of entangled networks is critical, since the interaction of different networks can affect the overall network and community stability. Here, we studied the interaction of plants and Lepidoptera on the Yongxing Island, South China Sea. A plant-lepidopteran pollination network and a plant-lepidopteran herbivore network were built by using data from flower-pollinator and leaf-herbivore interactions. We then combined the two networks into a single network. We measured plant composition similarity within each sub-network and across sub-networks for Lepidoptera species. Our findings indicate that the plant-Lepidoptera pollination network and the herbivory network share significant proportions of Lepidoptera but small proportions of plant assemblages. The pollination network had higher nestedness and connectance than the herbivore network. Agrius convolvuli was the most specialized species, while Zizina otis had the highest species strength in the pollination network. Most Lepidoptera species were highly specialized in the herbivore network and their importance positively correlated across the two networks. Furthermore, there was no dietary composition similarity between the two networks for most Lepidoptera species. Our findings highlight the visible structural difference between the pollination and the herbivore networks. Adult Lepidoptera selects different plants for oviposition and feeding, a strategy that may benefit their reproduction and survival by sustaining adequate resources for their two life stages and the diversity of both plants and insects in oceanic island communities.
Collapse
Affiliation(s)
- Xiangping Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, The Chinese Academy of Sciences, Guangzhou, Guangdong, China
- South China National Botanical Garden, Guangzhou, China
| | - Xiao Fu
- Ningxia Yunwu Mountain National Natural Reserve, Guyuan, China
| | - Miaomiao Shi
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, The Chinese Academy of Sciences, Guangzhou, Guangdong, China
- South China National Botanical Garden, Guangzhou, China
| | - Chunquan Xue
- Guangdong Forestry Survey and Planning Institute, Guangzhou, China
| | - Jiazhi Yang
- Guangdong Forestry Survey and Planning Institute, Guangzhou, China
| | - Zhongtao Zhao
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, The Chinese Academy of Sciences, Guangzhou, Guangdong, China
- South China National Botanical Garden, Guangzhou, China
| | - Shijin Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, The Chinese Academy of Sciences, Guangzhou, Guangdong, China
- South China National Botanical Garden, Guangzhou, China
| | - Tieyao Tu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, The Chinese Academy of Sciences, Guangzhou, Guangdong, China
- South China National Botanical Garden, Guangzhou, China
| |
Collapse
|
5
|
Suzuki-Ohno Y, Ishihama F, Yokoyama J, Inoue MN, Nakashizuka T, Kawata M. Estimating bee distributions and their functional range to map important areas for protecting bee species and their functions. Sci Rep 2024; 14:12842. [PMID: 38918494 PMCID: PMC11199664 DOI: 10.1038/s41598-024-61848-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 05/10/2024] [Indexed: 06/27/2024] Open
Abstract
The decline of wild bee populations causes the decline of bee-pollinated plant populations through the deterioration of pollination services. Since high bee species richness generally involves high functional group diversity, protecting areas of high bee species richness will help to maintain pollination services for plants. However, those areas do not always include the habitats of bee species with specialized functions that expand the range of plants being pollinated. To map important areas for protecting native bee species and their functions, we estimated the distributions and functional range of 13 bumble bee species and 1 honey bee species in Japan. The distributions were estimated from an ensemble of six species distribution models using bee occurrence data and environmental data. The functional range of bee species was estimated by combining the estimated distributions and proboscis length, which frequently corresponds to the floral shape of the plant species they pollinate. The estimated species richness was high in western Hokkaido and the estimated functional range was wide in central Honshu. Our method is useful to see whether areas important for high species richness of pollinators differ from those for rare species or their functions.
Collapse
Affiliation(s)
- Yukari Suzuki-Ohno
- Graduate School of Life Sciences, Tohoku University, 6-3 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi, 980-8578, Japan.
| | - Fumiko Ishihama
- Biodiversity Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
| | - Jun Yokoyama
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa, Yamagata-shi, Yamagata, 990-8560, Japan
| | - Maki N Inoue
- Department of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai, Fuchu, Tokyo, 183-8509, Japan
| | - Tohru Nakashizuka
- Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki, 305-8687, Japan
| | - Masakado Kawata
- Graduate School of Life Sciences, Tohoku University, 6-3 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| |
Collapse
|
6
|
Hederström V, Ekroos J, Friberg M, Krausl T, Opedal ØH, Persson AS, Petrén H, Quan Y, Smith HG, Clough Y. Pollinator-mediated effects of landscape-scale land use on grassland plant community composition and ecosystem functioning - seven hypotheses. Biol Rev Camb Philos Soc 2024; 99:675-698. [PMID: 38118437 DOI: 10.1111/brv.13040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/22/2023]
Abstract
Environmental change is disrupting mutualisms between organisms worldwide. Reported declines in insect populations and changes in pollinator community compositions in response to land use and other environmental drivers have put the spotlight on the need to conserve pollinators. While this is often motivated by their role in supporting crop yields, the role of pollinators for reproduction and resulting taxonomic and functional assembly in wild plant communities has received less attention. Recent findings suggest that observed and experimental gradients in pollinator availability can affect plant community composition, but we know little about when such shifts are to be expected, or the impact they have on ecosystem functioning. Correlations between plant traits related to pollination and plant traits related to other important ecosystem functions, such as productivity, nitrogen uptake or palatability to herbivores, lead us to expect non-random shifts in ecosystem functioning in response to changes in pollinator communities. At the same time, ecological and evolutionary processes may counteract these effects of pollinator declines, limiting changes in plant community composition, and in ecosystem functioning. Despite calls to investigate community- and ecosystem-level impacts of reduced pollination, the study of pollinator effects on plants has largely been confined to impacts on plant individuals or single-species populations. With this review we aim to break new ground by bringing together aspects of landscape ecology, ecological and evolutionary plant-insect interactions, and biodiversity-ecosystem functioning research, to generate new ideas and hypotheses about the ecosystem-level consequences of pollinator declines in response to land-use change, using grasslands as a focal system. Based on an integrated set of seven hypotheses, we call for more research investigating the putative pollinator-mediated links between landscape-scale land use and ecosystem functioning. In particular, future research should use combinations of experimental and observational approaches to assess the effects of changes in pollinator communities over multiple years and across species on plant communities and on trait distributions both within and among species.
Collapse
Affiliation(s)
- Veronica Hederström
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Johan Ekroos
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Magne Friberg
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Theresia Krausl
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Øystein H Opedal
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Anna S Persson
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Hampus Petrén
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Yuanyuan Quan
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Henrik G Smith
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Yann Clough
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| |
Collapse
|
7
|
Silvert CJ, Gusto C, Warner LA, Diaz JM, Mallinger RE. How can residents protect and promote pollinators? The diffusion of residential pollinator-friendly gardening. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118877. [PMID: 37708642 DOI: 10.1016/j.jenvman.2023.118877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 08/03/2023] [Accepted: 08/26/2023] [Indexed: 09/16/2023]
Abstract
Urbanization and land use change are leading causes of declines in pollinator abundance and diversity. However, researchers in different regions of the world have found that some pollinators can thrive in urban landscapes, depending on land use practices, environmental conditions, and species traits. Residential landscapes constitute a significant portion of urban green space and thus, residents' adoption of landscape practices to promote pollinators can play a central role in addressing the global pollinator challenge. Yet, although residents' willingness and intention appear strong, adoption of pollinator-friendly gardening remains low. The present study - guided by the Diffusion of Innovations theory - aimed to build empirical understanding by surveying 1598 [State] residents on their experiences and perceptions related to pollinator-friendly gardening to determine the most salient barriers and opportunities to engagement. Key findings suggest making the practice more widely observable and reducing perceived complexity in learning to do the practice are critical to promoting adoption. This demonstrates, in practical terms, that: (1) targeted efforts to build residents' actionable knowledge about pollinator-friendly gardening may significantly reduce uncertainty and boost the likelihood of adoption; and (2) examples of active pollinator gardens need to be more widely showcased and popularized (e.g., through experiential or virtual demonstrations). We also found most residents living in homeowner associations (HOAs) believed HOA policies on pollinator-friendly gardening were restrictive or the residents were unsure whether they are allowed to practice pollinator-friendly gardening. Given these perceptions strongly associated with residents' low intent to engage in pollinator-friendly gardening, a major opportunity exists to diffuse the practice and increase adoption by working with HOAs and community leaders to become promoters of - rather than barriers to - pollinator-friendly gardening.
Collapse
Affiliation(s)
- Colby J Silvert
- University of Maryland, Department of Plant Science and Landscape Architecture, College Park, MD, United States.
| | - Cody Gusto
- University of Florida, Department of Agricultural Education and Communication, Gainesville, FL, United States
| | - Laura A Warner
- University of Florida, Department of Agricultural Education and Communication, Gainesville, FL, United States
| | - John M Diaz
- University of Florida, Department of Agricultural Education and Communication, Gainesville, FL, United States
| | - Rachel E Mallinger
- University of Florida, Entomology and Nematology Department, Gainesville, FL, United States
| |
Collapse
|
8
|
Dingha BN, Jackai LE. Chemical Composition of Four Industrial Hemp ( Cannabis sativa L.) Pollen and Bee Preference. INSECTS 2023; 14:668. [PMID: 37623378 PMCID: PMC10455179 DOI: 10.3390/insects14080668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/11/2023] [Accepted: 07/21/2023] [Indexed: 08/26/2023]
Abstract
Apart from its economic value, industrial hemp (Cannabis sativa L.) is a prolific pollen producer, serving as a food source for bees. However, little is known regarding the extent to which varietal differences in hemp pollen chemistry influences bee preference. Here, we report the chemical profile of pollen from four hemp varieties (Canda, CFX-2, Henola, and Joey) and bee abundance and diversity, using direct visual counts and pan traps. The number and type of bees on each variety was recorded and the chemical composition (proximate analysis and mineral, amino, and fatty acid profiles) of pollen from each hemp variety was determined. During the entire sampling period, three bee types (bumble bees, honey bees, and sweat bees) were recorded, with a combined total of 1826. Among these, sweat bees and bumble bees were the most prevalent and were highest on the Joey variety. The four varieties expressed protein content ranging from 6.05% to 6.89% and the highest in Henola. Seventeen amino acids were expressed in all varieties, with leucine recording the highest content ranging from 4.00 mg/g in Canda to 4.54 mg/g in Henola. In general, Henola expressed high protein, amino acid, and saturated and monosaturated fatty acid contents and recorded significantly fewer bees compared with Joey, which had a low content of these components and a high content of polyunsaturated fatty acids. Our findings suggest that, while industrial hemp offers abundant and accessible pollen that would promote bee health and sustainability of their ecosystem services, the nutritional quality may not be adequate for bee growth and development as an exclusive pollen source.
Collapse
Affiliation(s)
- Beatrice N. Dingha
- Department of Natural Resources and Environmental Design, North Carolina A&T State University, Greensboro, NC 27411, USA;
| | | |
Collapse
|
9
|
Pei C, Hovick TJ, Limb RF, Harmon JP, Geaumont BA. Invasive grass and litter accumulation constrain bee and plant diversity in altered grasslands. Glob Ecol Conserv 2023. [DOI: 10.1016/j.gecco.2022.e02352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
10
|
Casanelles‐Abella J, Fontana S, Fournier B, Frey D, Moretti M. Low resource availability drives feeding niche partitioning between wild bees and honeybees in a European city. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2023; 33:e2727. [PMID: 36054537 PMCID: PMC10077915 DOI: 10.1002/eap.2727] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 04/14/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
Cities are socioecological systems that filter and select species, therefore establishing unique species assemblages and biotic interactions. Urban ecosystems can host richer wild bee communities than highly intensified agricultural areas, specifically in resource-rich urban green spaces such as allotments and family gardens. At the same time, urban beekeeping has boomed in many European cities, raising concerns that the fast addition of a large number of managed bees could deplete the existing floral resources, triggering competition between wild bees and honeybees. Here, we studied the interplay between resource availability and the number of honeybees at local and landscape scales and how this relationship influences wild bee diversity. We collected wild bees and honeybees in a pollination experiment using four standardized plant species with distinct floral morphologies. We performed the experiment in 23 urban gardens in the city of Zurich (Switzerland), distributed along gradients of urban and local management intensity, and measured functional traits related to resource use. At each site, we quantified the feeding niche partitioning (calculated as the average distance in the multidimensional trait space) between the wild bee community and the honeybee population. Using multilevel structural equation models (SEM), we tested direct and indirect effects of resource availability, urban beekeeping, and wild bees on the community feeding niche partitioning. We found an increase in feeding niche partitioning with increasing wild bee species richness. Moreover, feeding niche partitioning tended to increase in experimental sites with lower resource availability at the landscape scale, which had lower abundances of honeybees. However, beekeeping intensity at the local and landscape scales did not directly influence community feeding niche partitioning or wild bee species richness. In addition, wild bee species richness was positively influenced by local resource availability, whereas local honeybee abundance was positively affected by landscape resource availability. Overall, these results suggest that direct competition for resources was not a main driver of the wild bee community. Due to the key role of resource availability in maintaining a diverse bee community, our study encourages cities to monitor floral resources to better manage urban beekeeping and help support urban pollinators.
Collapse
Affiliation(s)
- Joan Casanelles‐Abella
- Biodiversity and Conservation BiologySwiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
- Institute of Terrestrial Ecosystems, ETH ZurichZurichSwitzerland
| | - Simone Fontana
- Biodiversity and Conservation BiologySwiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
- Nature Conservation and Landscape EcologyUniversity of FreiburgFreiburgGermany
| | - Bertrand Fournier
- Institute of Environmental Sciences and Geography, University of PotsdamPotsdamGermany
| | - David Frey
- Biodiversity and Conservation BiologySwiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
| | - Marco Moretti
- Biodiversity and Conservation BiologySwiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
| |
Collapse
|
11
|
Temporal and spatial niche complementarity in sunflower pollinator communities and pollination function. Basic Appl Ecol 2023. [DOI: 10.1016/j.baae.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
12
|
Zoller L, Bennett J, Knight TM. Plant-pollinator network change across a century in the subarctic. Nat Ecol Evol 2023; 7:102-112. [PMID: 36593294 DOI: 10.1038/s41559-022-01928-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/10/2022] [Indexed: 01/03/2023]
Abstract
Animal-mediated pollination is a vital ecosystem service to crops and wild plants, and long-term stability of plant-pollinator interactions is therefore crucial for maintaining plant biodiversity and food security. However, it is unknown how the composition of pollinators and the structure of pollinator interactions have changed across longer time spans relevant to examining responses to human activities such as climate change. We resampled an historical dataset of plant-pollinator interactions across several orders of pollinating insects in a subarctic location in Finland that has already experienced substantial climate warming but little land use change. Our results reveal a dramatic turnover in pollinator species and rewiring of plant-pollinator interactions, with only 7% of the interactions shared across time points. The relative abundance of moth and hoverfly pollinators declined between time points, whereas muscoid flies, a group for which little is known regarding conservation status and responses to climate, became more common. Specialist pollinators disproportionately declined, leading to a decrease in network-level specialization, which could have harmful consequences for pollination services. Our results exemplify the changes in plant-pollinator networks that might be expected in other regions as climate change progresses.
Collapse
Affiliation(s)
- Leana Zoller
- Institute of Biology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany. .,German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.
| | - Joanne Bennett
- Institute of Biology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany.,Centre for Applied Water Science, Institute for Applied Ecology, Faculty of Science and Technology, University of Canberra, Bruce, Australian Capital Territory, Australia
| | - Tiffany M Knight
- Institute of Biology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany.,German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.,Department of Community Ecology, Helmholtz Centre for Environmental Research-UFZ, Halle (Saale), Germany
| |
Collapse
|
13
|
Yu Y, Zhou W, Li Y, Wan W, Yao D, Wei X. Nuclear and Mitochondrial DNA Suggest That Nature Reserve Maintains Novel Haplotypes and Genetic Diversity of Honeybees (Apis cerana). RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422120146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
14
|
Katumo DM, Liang H, Ochola AC, Lv M, Wang QF, Yang CF. Pollinator diversity benefits natural and agricultural ecosystems, environmental health, and human welfare. PLANT DIVERSITY 2022; 44:429-435. [PMID: 36187551 PMCID: PMC9512639 DOI: 10.1016/j.pld.2022.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 01/22/2022] [Accepted: 01/25/2022] [Indexed: 06/16/2023]
Abstract
Biodiversity loss during the Anthropocene is a serious ecological challenge. Pollinators are important vectors that provide multiple essential ecosystem services but are declining rapidly in this changing world. However, several studies have argued that a high abundance of managed bee pollinators, such as honeybees (Apis mellifera), may be sufficient to provide pollination services for crop productivity, and sociological studies indicate that the majority of farmers worldwide do not recognize the contribution of wild pollinator diversity to agricultural yield. Here, we review the importance of pollinator diversity in natural and agricultural ecosystems that may be thwarted by the increase in abundance of managed pollinators such as honeybees. We also emphasize the additional roles diverse pollinator communities play in environmental safety, culture, and aesthetics. Research indicates that in natural ecosystems, pollinator diversity enhances pollination during environmental and climatic perturbations, thus alleviating pollen limitation. In agricultural ecosystems, pollinator diversity increases the quality and quantity of crop yield. Furthermore, studies indicate that many pollinator groups are useful in monitoring environmental pollution, aid in pest and disease control, and provide cultural and aesthetic value. During the uncertainties that may accompany rapid environmental changes in the Anthropocene, the conservation of pollinator diversity must expand beyond bee conservation. Similarly, the value of pollinator diversity maintenance extends beyond the provision of pollination services. Accordingly, conservation of pollinator diversity requires an interdisciplinary approach with contributions from environmentalists, taxonomists, and social scientists, including artists, who can shape opinions and behavior.
Collapse
Affiliation(s)
- Daniel Mutavi Katumo
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Huan Liang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Anne Christine Ochola
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Min Lv
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Qing-Feng Wang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Chun-Feng Yang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| |
Collapse
|
15
|
Gómez‐Martínez C, González‐Estévez MA, Cursach J, Lázaro A. Pollinator richness, pollination networks, and diet adjustment along local and landscape gradients of resource diversity. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2022; 32:e2634. [PMID: 35403772 PMCID: PMC9539497 DOI: 10.1002/eap.2634] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 02/06/2022] [Accepted: 02/18/2022] [Indexed: 06/14/2023]
Abstract
Loss of habitats and native species, introduction of invasive species, and changing climate regimes lead to the homogenization of landscapes and communities, affecting the availability of habitats and resources for economically important guilds, such as pollinators. Understanding how pollinators and their interactions vary along resource diversity gradients at different scales may help to determine their adaptability to the current diversity loss related to global change. We used data on 20 plant-pollinator communities along gradients of flower richness (local diversity) and landscape heterogeneity (landscape diversity) to understand how the diversity of resources at local and landscape scales affected (1) wild pollinator abundance and richness (accounting also for honey bee abundance), (2) the structure of plant-pollinator networks, (3) the proportion of actively selected interactions (those not occurring by neutral processes), and (4) pollinator diet breadth and species' specialization in networks. Wild pollinator abundance was higher overall in flower-rich and heterogeneous habitats, while wild pollinator richness increased with flower richness (more strongly for beetles and wild bees) and decreased with honeybee abundance. Network specialization (H2 '), modularity, and functional complementarity were all positively related to floral richness and landscape heterogeneity, indicating niche segregation as the diversity of resources increases at both scales. Flower richness also increased the proportion of actively selected interactions (especially for wild bees and flies), whereas landscape heterogeneity had a weak negative effect on this variable. Overall, network-level metrics responded to larger landscape scales than pollinator-level metrics did. Higher floral richness resulted in a wider taxonomic and functional diet for all the study guilds, while functional diet increased mainly for beetles. Despite this, specialization in networks (d') increased with flower richness for all the study guilds, because pollinator species fed on a narrower subset of plants as communities became richer in species. Our study indicates that pollinators are able to adapt their diet to resource changes at local and landscape scales. However, resource homogenization might lead to poor and generalist pollinator communities, where functionally specialized interactions are lost. This study highlights the importance of including different scales to understand the effects of global change on pollination service through changes in resource diversity.
Collapse
Affiliation(s)
- Carmelo Gómez‐Martínez
- Global Change Research GroupMediterranean Institute for Advanced Studies (UIB‐CSIC)EsporlesSpain
| | | | - Joana Cursach
- Department of Biology, Laboratory of Botany, Research Group on Plant Biology under Mediterranean ConditionsUniversity of the Balearic IslandsPalmaSpain
| | - Amparo Lázaro
- Global Change Research GroupMediterranean Institute for Advanced Studies (UIB‐CSIC)EsporlesSpain
- Department of Biology, Ecology AreaUniversity of the Balearic IslandsPalmaSpain
| |
Collapse
|
16
|
Morozumi C, Loy X, Reynolds V, Schiffer A, Morrison B, Savage J, Brosi B. Simultaneous niche expansion and contraction in plant–pollinator networks under drought. OIKOS 2022. [DOI: 10.1111/oik.09265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Connor Morozumi
- Program in Population Biology, Ecology and Evolution, Emory Univ. Atlanta GA USA
| | - Xingwen Loy
- Program in Population Biology, Ecology and Evolution, Emory Univ. Atlanta GA USA
- Southeastern Center for Conservation, Atlanta Botanical Garden Atlanta GA USA
| | - Victoria Reynolds
- School of Biological Sciences, Univ. of Queensland Brisbane QLD Australia
| | - Annie Schiffer
- Dept of Environmental Sciences, Emory Univ. Atlanta GA USA
- Dept of Biology, Univ. of Washington Seattle WA USA
| | - Beth Morrison
- Dept of Environmental Sciences, Emory Univ. Atlanta GA USA
| | - Jade Savage
- Dept of Biological Sciences, Bishop's Univ. Sherbrooke QC Canada
| | - Berry Brosi
- Dept of Environmental Sciences, Emory Univ. Atlanta GA USA
- Rocky Mountain Biological Laboratory Crested Butte CO USA
- Dept of Biology, Univ. of Washington Seattle WA USA
| |
Collapse
|
17
|
Kovács-Hostyánszki A, Szigeti V, Miholcsa Z, Sándor D, Soltész Z, Török E, Fenesi A. Threats and benefits of invasive alien plant species on pollinators. Basic Appl Ecol 2022. [DOI: 10.1016/j.baae.2022.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
18
|
Lanner J, Dubos N, Geslin B, Leroy B, Hernández-Castellano C, Dubaić JB, Bortolotti L, Calafat JD, Ćetković A, Flaminio S, Le Féon V, Margalef-Marrase J, Orr M, Pachinger B, Ruzzier E, Smagghe G, Tuerlings T, Vereecken NJ, Meimberg H. On the road: Anthropogenic factors drive the invasion risk of a wild solitary bee species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 827:154246. [PMID: 35245544 DOI: 10.1016/j.scitotenv.2022.154246] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/20/2022] [Accepted: 02/26/2022] [Indexed: 06/14/2023]
Abstract
Complex biotic networks of invaders and their new environments pose immense challenges for researchers aiming to predict current and future occupancy of introduced species. This might be especially true for invasive bees, as they enter novel trophic interactions. Little attention has been paid to solitary, invasive wild bees, despite their increasing recognition as a potential global threat to biodiversity. Here, we present the first comprehensive species distribution modelling approach targeting the invasive bee Megachile sculpturalis, which is currently undergoing parallel range expansion in North America and Europe. While the species has largely colonised the most highly suitable areas of North America over the past decades, its invasion of Europe seems to be in its early stages. We showed that its current distribution is largely explained by anthropogenic factors, suggesting that its spread is facilitated by road and maritime traffic, largely beyond its intrinsic dispersal ability. Our results suggest that M. sculpturalis is likely to be negatively affected by future climate change in North America, while in Europe the potential suitable areas at-risk of invasion remain equally large. Based on our study, we emphasise the role of expert knowledge for evaluation of ecologically meaningful variables implemented and interpreted for species distribution modelling. We strongly recommend that the monitoring of this and other invasive pollinator species should be prioritised in areas identified as at-risk, alongside development of effective management strategies.
Collapse
Affiliation(s)
- Julia Lanner
- University of Natural Resources and Life Sciences, Department of Integrative Biology and Biodiversity Research; Institute of Integrative Conservation Research, Gregor Mendel Str., 33, 1080 Vienna, Austria.
| | - Nicolas Dubos
- Territoire Environnement Teledetection Information Spatiale (TETIS), University of Montpellier, INRAE, Montpellier, France
| | - Benoît Geslin
- IMBE, Aix Marseille Université, Avignon Université, CNRS, IRD, Marseille, France
| | - Boris Leroy
- Muséum National d'Histoire Naturelle, Lab. Biologie des Organismes et des Ecosystèmes Aquatiques, Dept. Adaptation du Vivant, France
| | | | - Jovana Bila Dubaić
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
| | - Laura Bortolotti
- CREA - Research Centre for Agriculture and Environment, Via di Saliceto 80, Bologna, Italy
| | - Joan Diaz Calafat
- Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, 230 53 Alnarp, Sweden
| | - Aleksandar Ćetković
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
| | - Simone Flaminio
- CREA - Research Centre for Agriculture and Environment, Via di Saliceto 80, Bologna, Italy
| | - Violette Le Féon
- Observatoire des Abeilles, 68 rue du Onze Novembre, 59148 Flines-lez-Raches, France
| | - Jordi Margalef-Marrase
- Centre de Recerca Ecològica i Aplicacions Forestals (CREAF), Cerdanyola del Vallès 08193, Spain
| | - Michael Orr
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Bärbel Pachinger
- University of Natural Resources and Life Sciences, Department of Integrative Biology and Biodiversity Research; Institute of Integrative Conservation Research, Gregor Mendel Str., 33, 1080 Vienna, Austria
| | - Enrico Ruzzier
- World Biodiversity Association Onlus c/o Museo Civico di Storia Naturale, Lungadige Porta Vittoria 9, Verona, Italy; Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, viale dell' Università 16, 35020 Legnaro, Italy
| | - Guy Smagghe
- Laboratory of Agrozoology, Department of Plant and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, Belgium
| | - Tina Tuerlings
- Laboratory of Agrozoology, Department of Plant and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, Belgium
| | - Nicolas J Vereecken
- Agroecology Lab, Université libre de Bruxelles (ULB), Boulevard du Triomphe CP 264/02, B-1050 Brussels, Belgium
| | - Harald Meimberg
- University of Natural Resources and Life Sciences, Department of Integrative Biology and Biodiversity Research; Institute of Integrative Conservation Research, Gregor Mendel Str., 33, 1080 Vienna, Austria
| |
Collapse
|
19
|
Temporal Variation in Pollinators’ Visitation of Lantana camara in a Tropical Urban Landscape: Does Butterfly Abundance and Richness Drive the Fruit Set? EKOLÓGIA (BRATISLAVA) 2022. [DOI: 10.2478/eko-2022-0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Pollinator richness, abundance and visitation frequency may be affected by the abundance of floral resources and abiotic factors, influencing plant reproductive success. We analysed whether the diversity, abundance and frequency of butterfly visitation on Lantana camara vary across the year in a tropical urban landscape and whether this variation in butterfly community influences plant’s reproductive success. A two-period survey, referred to here as rainier and drier seasons, was carried out in 12 spatially independent plants. Five pollination treatments were applied: single visit, hand cross-pollination, hand self-pollination, spontaneous self-pollination and open pollination (control). A total of 15,749 flowers were used for fruit production analysis. Butterfly richness, abundance and the reproductive success of L. camara increased in the drier season. Open pollination was ninefold more reproductively successful during the drier season. Fruit production of hand cross-pollinated plants was threefold higher than open-pollinated plants during the rainier season. No significant difference was found between these treatments in the drier season, attesting the highest abundance of pollination during this period. We provide evidence that changes in the pollinator community affect fruit production. The increase in pollinator diversity allows different visitors to pollinate the plant, increasing fruit set through functional complementarity. This effort establishes baseline data of plant–pollinator interactions for further long-term investigations across different weather seasons. The understanding of L. camara and butterflies’ synergism will support conservation measures of pollinator populations.
Collapse
|
20
|
Simpson DT, Weinman LR, Genung MA, Roswell M, MacLeod M, Winfree R. Many bee species, including rare species, are important for function of entire plant-pollinator networks. Proc Biol Sci 2022; 289:20212689. [PMID: 35414236 PMCID: PMC9006027 DOI: 10.1098/rspb.2021.2689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
It is important to understand how biodiversity, including that of rare species, affects ecosystem function. Here, we consider this question with regard to pollination. Studies of pollination function have typically focused on pollination of single plant species, or average pollination across plants, and typically find that pollination depends on a few common species. Here, we used data from 11 plant-bee visitation networks in New Jersey, USA, to ask whether the number of functionally important bee species changes as we consider function separately for each plant species in increasingly diverse plant communities. Using rarefaction analysis, we found the number of important bee species increased with the number of plant species. Overall, 2.5 to 7.6 times more bee species were important at the community scale, relative to the average plant species in the same community. This effect did not asymptote in any of our datasets, suggesting that even greater bee biodiversity is needed in real-world systems. Lastly, on average across plant communities, 25% of bee species that were important at the community scale were also numerically rare within their network, making this study one of the strongest empirical demonstrations to date of the functional importance of rare species.
Collapse
Affiliation(s)
| | | | - Mark A Genung
- Department of Ecology, Evolution and Natural Resources, Rutgers University, 14 College Farm Road, New Brunswick, NJ 08901, USA.,Department of Biology, University of Louisiana, Lafayette, LA 70503, USA
| | - Michael Roswell
- Graduate Program in Ecology and Evolution, and.,Department of Entomology, University of Maryland, College Park, MD 20742, USA
| | - Molly MacLeod
- Graduate Program in Ecology and Evolution, and.,Science Communications and Engagement, BioMarin Pharmaceutical Inc., Science Communications and Engagement, San Rafael, CA 94901, USA
| | - Rachael Winfree
- Department of Ecology, Evolution and Natural Resources, Rutgers University, 14 College Farm Road, New Brunswick, NJ 08901, USA
| |
Collapse
|
21
|
Suni S, Hall E, Bahu E, Hayes H. Urbanization increases floral specialization of pollinators. Ecol Evol 2022; 12:e8619. [PMID: 35309755 PMCID: PMC8901868 DOI: 10.1002/ece3.8619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/18/2021] [Accepted: 09/19/2021] [Indexed: 11/12/2022] Open
Abstract
Understanding how urbanization alters functional interactions among pollinators and plants is critically important given increasing anthropogenic land use and declines in pollinator populations. Pollinators often exhibit short‐term specialization and visit plants of the same species during one foraging trip. This facilitates plant receipt of conspecific pollen—pollen on a pollinator that is the same species as the plant on which the pollinator was foraging. Conspecific pollen receipt facilitates plant reproductive success and is thus important to plant and pollinator persistence. We investigated how urbanization affects short‐term specialization of insect pollinators by examining pollen loads on insects’ bodies and identifying the number and species of pollen grains on insects caught in urban habitat fragments and natural areas. We assessed possible drivers of differences between urban and natural areas, including frequency dependence in foraging, species richness and diversity of the plant and pollinator communities, floral abundance, and the presence of invasive plant species. Pollinators were more specialized in urban fragments than in natural areas, despite no differences in the species richness of plant communities across site types. These differences were likely driven by higher specialization of common pollinators, which were more abundant in urban sites. In addition, pollinators preferred to forage on invasive plants at urban sites and native plants at natural sites. Our findings reveal indirect effects of urbanization on pollinator fidelity to individual plant species and have implications for the maintenance of plant species diversity in small habitat fragments. Higher preference of pollinators for invasive plants at urban sites suggests that native species may receive fewer visits by pollinators. Therefore, native plant species diversity may decline in urban sites without continued augmentation of urban flora or removal of invasive species.
Collapse
Affiliation(s)
- Sevan Suni
- Department of Biology University of San Francisco San Francisco California USA
| | - Erin Hall
- Department of Biology University of San Francisco San Francisco California USA
| | - Evangelina Bahu
- Department of Biology University of San Francisco San Francisco California USA
| | - Hannah Hayes
- Department of Biology University of San Francisco San Francisco California USA
| |
Collapse
|
22
|
Bednarska AJ, Mikołajczyk Ł, Ziółkowska E, Kocjan K, Wnęk A, Mokkapati JS, Teper D, Kaczyński P, Łozowicka B, Śliwińska R, Laskowski R. Effects of agricultural landscape structure, insecticide residues, and pollen diversity on the life-history traits of the red mason bee Osmia bicornis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:151142. [PMID: 34688758 DOI: 10.1016/j.scitotenv.2021.151142] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/02/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
Agricultural landscapes have changed substantially in recent decades, shifting from the dominance of small fields (S) with diverse cropping systems toward large-scale monoculture (L), where landscape heterogeneity disappears. In this study, artificial nests of the red mason bee, Osmia bicornis, were placed in S and L landscape types on the perimeter of oilseed rape fields representing different oilseed rape coverages (ORC, % land cover). The local landscape structure around each nest was characterised within a 100, 200, 500, and 1000 m radius using ORC and 14 landscape characteristics, which were then reduced by non-metric multidimensional scaling (nMDS) to two axes: nMDS1 characterised the dataset primarily according to land fragmentation and the main crop, whereas nMDS2 captured the prevalence of more natural areas in the landscape. Pollen diversity and insecticide risk levels in the pollen provisions collected by the bees were analysed, and their dependence on the landscape structure was tested. Thereafter, the effects of pollen diversity, insecticide risk, and landscape structure on the life-history traits of bees and their sensitivity to topically applied Dursban 480 EC were determined. Pollen taxa richness in a single nest ranged from 3 to 12, and 34 pesticides were detected in the pollen at concentrations of up to 320 ng/g for desmedipham. The O. bicornis foraging range was relatively large, indicating that the landscape structure within a radius of ~1000 m around the nest is important for this species. Pollen diversity in the studied areas was of minor importance for bee performance, but the ORC or landscape structure significantly affected the life-history traits of the bees. Contamination of pollen with insecticides affected the bees by decreasing the mass of newly emerged adults but their sensitivity to Dursban 480 EC was not related to environmental variables.
Collapse
Affiliation(s)
- Agnieszka J Bednarska
- Institute of Nature Conservation, Polish Academy of Sciences, A. Mickiewicza 33, 31-120 Kraków, Poland.
| | - Łukasz Mikołajczyk
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Elżbieta Ziółkowska
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Karolina Kocjan
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Agnieszka Wnęk
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Jaya Sravanthi Mokkapati
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Dariusz Teper
- Research Institute of Horticulture, Apiculture Division, Kazimierska 2, 24-100 Puławy, Poland
| | - Piotr Kaczyński
- Institute of Plant Protection, National Research Institute, Laboratory of Food and Feed Safety, Chełmońskiego 22, 15-195 Białystok, Poland
| | - Bożena Łozowicka
- Institute of Plant Protection, National Research Institute, Laboratory of Food and Feed Safety, Chełmońskiego 22, 15-195 Białystok, Poland
| | - Renata Śliwińska
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Ryszard Laskowski
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| |
Collapse
|
23
|
Cecala JM, Wilson Rankin EE. Diversity and turnover of wild bee and ornamental plant assemblages in commercial plant nurseries. Oecologia 2022; 198:773-783. [PMID: 35201380 DOI: 10.1007/s00442-022-05135-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 02/08/2022] [Indexed: 01/30/2023]
Abstract
In human-modified landscapes, understanding how habitat characteristics influence the diversity and composition of beneficial organisms is critical to conservation efforts and modeling ecosystem services. Assessing turnover, or the magnitude of change in species composition across sites or through time, is crucial to said efforts, yet is often overlooked. For pollinators such as wild bees, variables influencing temporal turnover, particularly across seasons within a year, remain poorly understood. To investigate how local and landscape characteristics correlate with bee diversity and turnover across seasons, we recorded wild bee and flowering ornamental plant assemblages at 13 plant nurseries in California between spring and autumn over 2 years. Nurseries cultivate a broad diversity of flowering plant species that differ widely across sites and seasons, providing an opportunity to test for correlations between turnover and diversity of plants and bees. As expected, we documented strong seasonal trends in wild bee diversity and composition. We found that local habitat factors, such as increased cultivation of native plants, were positively associated with bee diversity in sweep netting collections, whereas we detected moderate influences of landscape level factors such as proportion of surrounding natural area in passive trap collections. We also detected a moderate positive correlation between the magnitude of turnover in plant species and that of bee species (as number of taxa gained) across consecutive seasons. Our results have implications for the conservation of wild bees in ornamental plant landscapes, and highlight the utility of plant nurseries for investigating hypotheses related to diversity and turnover in plant-pollinator systems.
Collapse
Affiliation(s)
- Jacob M Cecala
- Department of Entomology, University of California, Riverside, CA, 92521, USA.
| | | |
Collapse
|
24
|
Bruninga-Socolar B, Winfree R, Crone EE. The contribution of plant spatial arrangement to bumble bee flower constancy. Oecologia 2022; 198:471-481. [PMID: 35080650 DOI: 10.1007/s00442-022-05114-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 01/10/2022] [Indexed: 11/30/2022]
Abstract
Floral constancy of foraging bees influences plant reproduction. Constancy as observed in nature arises from at least four distinct mechanisms frequently confounded in the literature: context-independent preferences for particular plant species, preferential visitation to the same species as the previous plant visited (simple constancy), the spatial arrangement of plants, and the relative abundances of co-flowering species. To disentangle these mechanisms, we followed individual bee flight paths within patches where all flowering plants were mapped, and we used step selection models to estimate how each mechanism influences the probability of selecting any particular plant given the available plants in a multi-species community. We found that simple constancy was positive: bees preferred to visit the same species sequentially. In addition, bees preferred to travel short distances and maintain their direction of travel between plants. After accounting for distance, we found no significant effect of site-level plant relative abundances on bee foraging choices. To explore the importance of the spatial arrangement of plants for bee foraging choices, we compared our full model containing all parameters to one with spatial arrangement removed. Due to bees' tendency to select nearby plants, combined with strong intraspecific plant clumping, spatial arrangement was responsible for about 50% of the total observed constancy. Our results suggest that floral constancy may be overestimated in studies that do not account for the spatial arrangement of plants, especially in systems with intraspecific plant clumping. Plant spatial patterns at within-site scales are important for pollinator foraging behavior and pollination success.
Collapse
Affiliation(s)
| | - Rachael Winfree
- Department of Ecology, Evolution, and Natural Resources, Rutgers University, New Brunswick, USA
| | | |
Collapse
|
25
|
Loy X, Brosi BJ. The effects of pollinator diversity on pollination function. Ecology 2022; 103:e3631. [PMID: 35050504 DOI: 10.1002/ecy.3631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/15/2021] [Accepted: 10/28/2021] [Indexed: 11/08/2022]
Abstract
Pollination is a key ecological function of most terrestrial ecosystems. Decades of research on single-trophic-level communities, particularly plant communities, have helped build the foundation of diversity-function theory. Yet as it stands, this theory appears to be less useful for inter-trophic-level functions such as pollination, as evidenced by empirical findings that are often inconsistent with theoretical expectations. In this review, we evaluate how canonical diversity-function theory has been applied to pollination function, focusing on empirical studies of the mechanisms that drive pollinator diversity-function relationships. We first identify key features of pollination function that have hampered reconciliation with current theory. We then examine terminology for mechanisms used to discuss the findings from pollinator diversity-function studies that are sometimes inconsistent with established ecological concepts. We propose a revised diversity-function framework and describe two non-canonical diversity-function mechanisms that are particularly applicable to pollination. The first, 'interactive functional complementarity', was identified previously but remains overlooked. The second, a new diversity-function mechanism, 'functional enhancement', occurs when pollinator diversity increases within-niche activity. Finally, we discuss experimental approaches necessary to detect diversity-function effects in pollination. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Xingwen Loy
- Conservation & Research Department, Atlanta Botanical Garden, Atlanta, GA
| | - Berry J Brosi
- Department of Biology, University of Washington, Seattle, WA
| |
Collapse
|
26
|
Leimberger KG, Dalsgaard B, Tobias JA, Wolf C, Betts MG. The evolution, ecology, and conservation of hummingbirds and their interactions with flowering plants. Biol Rev Camb Philos Soc 2022; 97:923-959. [PMID: 35029017 DOI: 10.1111/brv.12828] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 01/14/2023]
Abstract
The ecological co-dependency between plants and hummingbirds is a classic example of a mutualistic interaction: hummingbirds rely on floral nectar to fuel their rapid metabolisms, and more than 7000 plant species rely on hummingbirds for pollination. However, threats to hummingbirds are mounting, with 10% of 366 species considered globally threatened and 60% in decline. Despite the important ecological implications of these population declines, no recent review has examined plant-hummingbird interactions in the wider context of their evolution, ecology, and conservation. To provide this overview, we (i) assess the extent to which plants and hummingbirds have coevolved over millions of years, (ii) examine the mechanisms underlying plant-hummingbird interaction frequencies and hummingbird specialization, (iii) explore the factors driving the decline of hummingbird populations, and (iv) map out directions for future research and conservation. We find that, despite close associations between plants and hummingbirds, acquiring evidence for coevolution (versus one-sided adaptation) is difficult because data on fitness outcomes for both partners are required. Thus, linking plant-hummingbird interactions to plant reproduction is not only a major avenue for future coevolutionary work, but also for studies of interaction networks, which rarely incorporate pollinator effectiveness. Nevertheless, over the past decade, a growing body of literature on plant-hummingbird networks suggests that hummingbirds form relationships with plants primarily based on overlapping phenologies and trait-matching between bill length and flower length. On the other hand, species-level specialization appears to depend primarily on local community context, such as hummingbird abundance and nectar availability. Finally, although hummingbirds are commonly viewed as resilient opportunists that thrive in brushy habitats, we find that range size and forest dependency are key predictors of hummingbird extinction risk. A critical direction for future research is to examine how potential stressors - such as habitat loss and fragmentation, climate change, and introduction of non-native plants - may interact to affect hummingbirds and the plants they pollinate.
Collapse
Affiliation(s)
- Kara G Leimberger
- Forest Biodiversity Research Network, Department of Forest Ecosystems and Society, Oregon State University, 3100 SW Jefferson Way, Corvallis, OR, 97331, U.S.A
| | - Bo Dalsgaard
- Center for Macroecology, Evolution and Climate, GLOBE Institute, University of Copenhagen, Universitetsparken 15, Copenhagen Ø, 2100, Denmark
| | - Joseph A Tobias
- Department of Life Sciences, Imperial College London, Silwood Park, Buckhurst Road, Ascot, Berkshire, SL5 7PY, U.K
| | - Christopher Wolf
- Forest Biodiversity Research Network, Department of Forest Ecosystems and Society, Oregon State University, 3100 SW Jefferson Way, Corvallis, OR, 97331, U.S.A
| | - Matthew G Betts
- Forest Biodiversity Research Network, Department of Forest Ecosystems and Society, Oregon State University, 3100 SW Jefferson Way, Corvallis, OR, 97331, U.S.A
| |
Collapse
|
27
|
Dehling DM, Riva GVD, Hutchinson MC, Stouffer DB. Niche packing and local coexistence in a megadiverse guild of frugivorous birds are mediated by fruit dependence and shifts in interaction frequencies. Am Nat 2021; 199:855-868. [DOI: 10.1086/718684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
28
|
|
29
|
Greenop A, Woodcock BA, Outhwaite CL, Carvell C, Pywell RF, Mancini F, Edwards FK, Johnson AC, Isaac NJB. Patterns of invertebrate functional diversity highlight the vulnerability of ecosystem services over a 45-year period. Curr Biol 2021; 31:4627-4634.e3. [PMID: 34411527 DOI: 10.1016/j.cub.2021.07.080] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/24/2021] [Accepted: 07/29/2021] [Indexed: 10/20/2022]
Abstract
Declines in invertebrate biodiversity1,2 pose a significant threat to key ecosystem services.3-5 Current analyses of biodiversity often focus on taxonomic diversity (e.g., species richness),6,7 which does not account for the functional role of a species. Functional diversity of species' morphological or behavioral traits is likely more relevant to ecosystem service delivery than taxonomic diversity, as functional diversity has been found to be a key driver of a number of ecosystem services including decomposition and pollination.8-12 At present, we lack a good understanding of long-term and large-scale changes in functional diversity, which limits our capacity to determine the vulnerability of key ecosystem services with ongoing biodiversity change. Here we derive trends in functional diversity and taxonomic diversity over a 45-year period across Great Britain for species supporting freshwater aquatic functions, pollination, natural pest control, and agricultural pests (a disservice). Species supporting aquatic functions showed a synchronous collapse and recovery in functional and taxonomic diversity. In contrast, pollinators showed an increase in taxonomic diversity, but a decline and recovery in functional diversity. Pest control agents and pests showed greater stability in functional diversity over the assessment period. We also found that functional diversity could appear stable or show patterns of recovery, despite ongoing changes in the composition of traits among species. Our results suggest that invertebrate assemblages can show considerable variability in their functional structure over time at a national scale, which provides an important step in determining the long-term vulnerability of key ecosystem services with ongoing biodiversity change.
Collapse
Affiliation(s)
- Arran Greenop
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.
| | - Ben A Woodcock
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Charlotte L Outhwaite
- Centre for Biodiversity and Environment Research, University College London, London WC1E 6BT, UK
| | - Claire Carvell
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Richard F Pywell
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Francesca Mancini
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - François K Edwards
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Andrew C Johnson
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Nick J B Isaac
- UK Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| |
Collapse
|
30
|
Faber JH, Marshall S, Brown AR, Holt A, van den Brink PJ, Maltby L. Identifying ecological production functions for use in ecosystem services-based environmental risk assessment of chemicals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 791:146409. [PMID: 33771395 DOI: 10.1016/j.scitotenv.2021.146409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/24/2021] [Accepted: 03/06/2021] [Indexed: 06/12/2023]
Abstract
There is increasing research interest in the application of the ecosystem services (ES) concept in the environmental risk assessment of chemicals to support formulating and operationalising regulatory environmental protection goals and making environmental risk assessment more policy- and value-relevant. This requires connecting ecosystem structure and processes to ecosystem function and henceforth to provision of ecosystem goods and services and their economic valuation. Ecological production functions (EPFs) may help to quantify these connections in a transparent manner and to predict ES provision based on function-related descriptors for service providing species, communities, ecosystems or habitats. We review scientific literature for EPFs to evaluate availability across provisioning and regulation and maintenance services (CICES v5.1 classification). We found quantitative production functions for nearly all ES, often complemented with economic valuation of physical or monetary flows. We studied the service providing units in these EPFs to evaluate the potential for extrapolation of toxicity data for test species obtained from standardised testing to ES provision. A broad taxonomic representation of service providers was established, but quantitative models directly linking standard test species to ES provision were extremely scarce. A pragmatic way to deal with this data gap would be the use of proxies for related taxa and stepwise functional extrapolation to ES provision and valuation, which we conclude possible for most ES. We suggest that EPFs may be used in defining specific protection goals (SPGs), and illustrate, using pollination as an example, the availability of information for the ecological entity and attribute dimensions of SPGs. Twenty-five pollination EPFs were compiled from the literature for biological entities ranging from 'colony' to 'habitat', with 75% referring to 'functional group'. With about equal representation of the attributes 'function', 'abundance' and 'diversity', SPGs for pollination therefore would seem best substantiated by EPFs at the level of functional group.
Collapse
Affiliation(s)
- J H Faber
- Wageningen Environmental Research, P.O. Box 47, 6700 AA Wageningen, the Netherlands.
| | - S Marshall
- 6 Prestwick Road, Great Denham, Bedford, UK
| | - A R Brown
- College of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
| | - A Holt
- Department of Animal and Plant Sciences, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK; Natural Capital Solutions Ltd, 1 Lucas Bridge Business Park, Old Greens Norton Road, Towcester, Northants NN12 8AX, UK
| | - P J van den Brink
- Wageningen Environmental Research, P.O. Box 47, 6700 AA Wageningen, the Netherlands; Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA, the Netherlands
| | - L Maltby
- Department of Animal and Plant Sciences, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK
| |
Collapse
|
31
|
O'Connor MI, Mori AS, Gonzalez A, Dee LE, Loreau M, Avolio M, Byrnes JEK, Cheung W, Cowles J, Clark AT, Hautier Y, Hector A, Komatsu K, Newbold T, Outhwaite CL, Reich PB, Seabloom E, Williams L, Wright A, Isbell F. Grand challenges in biodiversity-ecosystem functioning research in the era of science-policy platforms require explicit consideration of feedbacks. Proc Biol Sci 2021; 288:20210783. [PMID: 34641733 PMCID: PMC8511742 DOI: 10.1098/rspb.2021.0783] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Feedbacks are an essential feature of resilient socio-economic systems, yet the feedbacks between biodiversity, ecosystem services and human wellbeing are not fully accounted for in global policy efforts that consider future scenarios for human activities and their consequences for nature. Failure to integrate feedbacks in our knowledge frameworks exacerbates uncertainty in future projections and potentially prevents us from realizing the full benefits of actions we can take to enhance sustainability. We identify six scientific research challenges that, if addressed, could allow future policy, conservation and monitoring efforts to quantitatively account for ecosystem and societal consequences of biodiversity change. Placing feedbacks prominently in our frameworks would lead to (i) coordinated observation of biodiversity change, ecosystem functions and human actions, (ii) joint experiment and observation programmes, (iii) more effective use of emerging technologies in biodiversity science and policy, and (iv) a more inclusive and integrated global community of biodiversity observers. To meet these challenges, we outline a five-point action plan for collaboration and connection among scientists and policymakers that emphasizes diversity, inclusion and open access. Efforts to protect biodiversity require the best possible scientific understanding of human activities, biodiversity trends, ecosystem functions and—critically—the feedbacks among them.
Collapse
Affiliation(s)
- Mary I O'Connor
- Department of Zoology, University of British Columbia, Vancouver, Canada.,Biodiversity Research Centre, University of British Columbia, Vancouver, Canada
| | - Akira S Mori
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
| | - Andrew Gonzalez
- Department of Biology, McGill University, Montreal, QC, Canada
| | - Laura E Dee
- Department of Ecology and Evolutionary Biology, University of Colorado at Boulder, Boulder, CO, USA
| | - Michel Loreau
- Theoretical and Empirical Ecology Station, CNRS, Moulis, France
| | - Meghan Avolio
- Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Jarrett E K Byrnes
- College of Science and Mathematics, University of Massachusetts-Boston, Boston, MA, USA
| | - William Cheung
- Biodiversity Research Centre, University of British Columbia, Vancouver, Canada.,Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, Canada
| | - Jane Cowles
- Department of Ecology, Evolution and Behavior, University of Minnesota, St Paul, MN, USA
| | - Adam T Clark
- Institute of Biology, University of Graz, Holteigasse 6, 8010 Graz, Austria
| | - Yann Hautier
- Ecology and Biodiversity Group, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Andrew Hector
- Department of Plant Sciences, University of Oxford, Oxford, UK
| | | | - Tim Newbold
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Charlotte L Outhwaite
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Peter B Reich
- Department of Forest Resources, University of Minnesota, St Paul, MN 55108 USA.,Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2753, Australia.,Institute for Global Change Biology, University of Michigan, Ann Arbor, MI 48109, USA.,School for Environment and Sustainability, University of Michigan, Ann Arbor, MI 48109, USA
| | - Eric Seabloom
- Department of Ecology, Evolution and Behavior, University of Minnesota, St Paul, MN, USA
| | - Laura Williams
- Department of Forest Resources, University of Minnesota, St Paul, MN 55108 USA
| | - Alexandra Wright
- Biological Sciences Department, California State University Los Angeles, 5151 State University Drive, Los Angeles, CA, USA
| | - Forest Isbell
- Department of Ecology, Evolution and Behavior, University of Minnesota, St Paul, MN, USA
| |
Collapse
|
32
|
Endres KL, Morozumi CN, Loy X, Briggs HM, CaraDonna PJ, Iler AM, Picklum DA, Barr WA, Brosi BJ. Plant-pollinator interaction niche broadens in response to severe drought perturbations. Oecologia 2021; 197:577-588. [PMID: 34546496 DOI: 10.1007/s00442-021-05036-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 08/16/2021] [Indexed: 11/30/2022]
Abstract
The composition of plant-pollinator interactions-i.e., who interacts with whom in diverse communities-is highly dynamic, and we have a very limited understanding of how interaction identities change in response to perturbations in nature. One prediction from niche and diet theory is that resource niches will broaden to compensate for resource reductions driven by perturbations, yet this has not been empirically tested in plant-pollinator systems in response to real-world perturbations in the field. Here, we use a long-term dataset of floral visitation to Ipomopsis aggregata, a montane perennial herb, to test whether the breadth of its floral visitation niche (i.e., flower visitor richness) changed in response to naturally occurring drought perturbations. Fewer floral resources are available in drought years, which could drive pollinators to expand their foraging niches, thereby expanding plants' floral visitation niches. We compared two drought years to three non-drought years to analyze changes in niche breadth and community composition of floral visitors to I. aggregata, predicting broadened niche breadth and distinct visitor community composition in drought years compared to non-drought years. We found statistically significant increases in niche breadth in drought years as compared to non-drought conditions, but no statistically distinguishable changes in community composition of flower visitors. Our findings suggest that plants' floral visitation niches may exhibit considerable plasticity in response to disturbance. This may have widespread consequences for community-level stability as well as functional consequences if increased niche overlap affects pollination services.
Collapse
Affiliation(s)
- Kelly L Endres
- Department of Environmental Sciences, Emory University, Atlanta, GA, USA
| | - Connor N Morozumi
- Program in Population Biology, Ecology, and Evolution, Emory University, Atlanta, GA, USA.
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA.
| | - Xingwen Loy
- Program in Population Biology, Ecology, and Evolution, Emory University, Atlanta, GA, USA
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
| | | | - Paul J CaraDonna
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- Plant Biology and Conservation, Northwestern University, Evanston, IL, USA
- Chicago Botanic Garden, The Negaunee Institute of Plant Conservation Science and Action, Glencoe, IL, USA
| | - Amy M Iler
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- Plant Biology and Conservation, Northwestern University, Evanston, IL, USA
- Chicago Botanic Garden, The Negaunee Institute of Plant Conservation Science and Action, Glencoe, IL, USA
| | - Devon A Picklum
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- Graduate Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, USA
| | - William A Barr
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
| | - Berry J Brosi
- Department of Environmental Sciences, Emory University, Atlanta, GA, USA
- Rocky Mountain Biological Laboratory, Crested Butte, CO, USA
- Department of Ecology and Evolution, University of Washington, Seattle, WA, USA
| |
Collapse
|
33
|
Garibaldi LA, Pérez-Méndez N, Cordeiro GD, Hughes A, Orr M, Alves-Dos-Santos I, Freitas BM, Freitas de Oliveira F, LeBuhn G, Bartomeus I, Aizen MA, Andrade PB, Blochtein B, Boscolo D, Drumond PM, Gaglianone MC, Gemmill-Herren B, Halinski R, Krug C, Maués MM, Piedade Kiill LH, Pinheiro M, Pires CSS, Viana BF. Negative impacts of dominance on bee communities: Does the influence of invasive honey bees differ from native bees? Ecology 2021; 102:e03526. [PMID: 34467526 DOI: 10.1002/ecy.3526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/23/2021] [Accepted: 07/30/2021] [Indexed: 11/09/2022]
Abstract
Invasive species can reach high abundances and dominate native environments. One of the most impressive examples of ecological invasions is the spread of the African subspecies of the honey bee throughout the Americas, starting from its introduction in a single locality in Brazil. The invasive honey bee is expected to more negatively impact bee community abundance and diversity than native dominant species, but this has not been tested previously. We developed a comprehensive and systematic bee sampling scheme, using a protocol deploying 11,520 pan traps across regions and crops for three years in Brazil. We found that invasive honey bees are now the single most dominant bee species. Such dominance has not only negative consequences for abundance and species richness of native bees but also for overall bee abundance (i.e., strong "numerical" effects of honey bees). Contrary to expectations, honey bees did not have stronger negative impacts than other native bees achieving similar levels of dominance (i.e., lack of negative "identity" effects of honey bees). These effects were markedly consistent across crop species, seasons and years, and were independent from land-use effects. Dominance could be a proxy of bee community degradation and more generally of the severity of ecological invasions.
Collapse
Affiliation(s)
- Lucas A Garibaldi
- Universidad Nacional de Río Negro, Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural, Mitre 630, San Carlos de Bariloche, Río Negro, 8400, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural, Mitre 630, San Carlos de Bariloche, Río Negro, 8400, Argentina
| | | | - Guaraci D Cordeiro
- Department of Biosciences, University of Salzburg, Kapitelgasse 4/6, Salzburg, 5020, Austria
| | - Alice Hughes
- Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Xishuangbanna, Yunnan, 666303, China
| | - Michael Orr
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Isabel Alves-Dos-Santos
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, trav. 14, n° 321, Cidade Universitária, São Paulo, 05508-090, Brazil
| | - Breno M Freitas
- Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal do Ceará, Laboratório de Abelhas, Campus do Pici - R. Cinco, 100 - Pres. Kennedy, Fortaleza, Ceará, 60455-970, Brazil
| | - Favízia Freitas de Oliveira
- Laboratório de Bionomia, Biogeografia e Sistemática de Insetos, Instituto de Biologia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, n° 668, Campus Universitário de Ondina, Salvador, Bahia, 40170-115, Brazil.,Instituto Nacional de Ciência e Tecnologia em Estudos Inter e Transdisciplinares em Ecologia e Evolução, 1154, R. Barão de Jeremoabo, 668 - Ondina, Salvador, Bahia, 40170-115, Brazil
| | - Gretchen LeBuhn
- San Francisco State University, 1600 Holloway Ave, San Francisco, California, 94132, USA
| | - Ignasi Bartomeus
- Estación Biológica de Doñana del Consejo Superior de Investigaciones Científicas, CSIC, Cartuja TA-10, Edificio I, C. Américo Vespucio, s/n, Sevilla, 41092, Spain
| | - Marcelo A Aizen
- Instituto de Investigaciones en Biodiversidad y Medio Ambiente, Universidad Nacional del Comahue-CONICET, Quintral 1250, San Carlos de Bariloche, Rio Negro, 8400, Argentina
| | - Patricia B Andrade
- Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal do Ceará, Laboratório de Abelhas, Campus do Pici - R. Cinco, 100 - Pres. Kennedy, Fortaleza, Ceará, 60455-970, Brazil
| | - Betina Blochtein
- Escola de Ciências da Saúde e da Vida, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga, 6681, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil
| | - Danilo Boscolo
- Instituto Nacional de Ciência e Tecnologia em Estudos Inter e Transdisciplinares em Ecologia e Evolução, 1154, R. Barão de Jeremoabo, 668 - Ondina, Salvador, Bahia, 40170-115, Brazil.,Departamento de Biologia, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900 Vila Monte Alegre, Ribeirão Preto, São Paulo, 14040-900, Brazil
| | - Patricia M Drumond
- Embrapa Mid-North, Av. Duque de Caxias n 5650 Buenos Aires, Teresina, Piauí, C.P 001 - 64008-780, Brazil
| | - Maria Cristina Gaglianone
- Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000 - Parque California, Campos dos Goytacazes, Rio de Janeiro, 28013-602, Brazil
| | | | - Rosana Halinski
- Escola Politécnica, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga, 6681 - Prédio 30 - Partenon, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil
| | - Cristiane Krug
- Centro de Pesquisa Agroflorestal, Embrapa Amazônia Ocidental, Rodovia AM 010 Km 29 Estrada Manau/Itacoatiara, Manaus, Amazonas, 69010-970, Brazil
| | - Márcia Motta Maués
- Laboratório de Entomologia, Embrapa Amazônia Oriental, Trav. Dr. Enéas Pinheiro, s/n°, Bairro do Marco, Belém, Pará, 66095-100, Brazil
| | - Lucia H Piedade Kiill
- Embrapa Tropical Semi-Arid, Rodovia BR-428, Km 152, Zona Rural, Petrolina, Pernambuco, 56302-970, Brazil
| | - Mardiore Pinheiro
- Universidade Federal da Fronteira Sul, R. Major Antônio Cardoso 590, Cerro Largo, Rio Grande do Sul, 97900-000, Brazil
| | - Carmen S S Pires
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final), Brasília, Distrito Federal, 70770-917, Brazil
| | - Blandina Felipe Viana
- Instituto Nacional de Ciência e Tecnologia em Estudos Inter e Transdisciplinares em Ecologia e Evolução, 1154, R. Barão de Jeremoabo, 668 - Ondina, Salvador, Bahia, 40170-115, Brazil.,Instituto de Biologia, Universidade Federal da Bahia, 1154, R. Barão de Jeremoabo, 668 - Ondina, Salvador, Bahia, 40170-115, Brazil
| |
Collapse
|
34
|
Guo PF, Wang MQ, Orr M, Li Y, Chen JT, Zhou QS, Staab M, Fornoff F, Chen GH, Zhang NL, Klein AM, Zhu CD. Reprint of: Tree diversity promotes predatory wasps and parasitoids but not pollinator bees in a subtropical experimental forest. Basic Appl Ecol 2021. [DOI: 10.1016/j.baae.2021.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
35
|
Ushimaru A, Rin I, Katsuhara KR. Covering and shading by neighbouring plants diminish pollinator visits to and reproductive success of a forest edge specialist dwarf species. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23:711-718. [PMID: 33811435 DOI: 10.1111/plb.13267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
The pollination and reproductive success of flowering plants can be negatively influenced in various ways by neighbouring heterospecific plants, such as resource competition and reproductive interference. We hypothesized that covering together with shading by neighbouring plants may reduce pollinator visits to and reproductive success of plants by reducing floral attractiveness and pollinator activity and by interrupting flower access, respectively. To test this hypothesis, we examined whether shaded and covered flowers suffered from pollinator limitation and low reproductive success in a population of the dwarf herb Lithospermum zollingeri, which co-exists with woody and herbaceous plants in anthropogenically maintained forest edge meadows. Here, shaded and covered flowers were defined as those beneath the shade of the woods and those whose front portion was covered by any vegetative part of neighbouring plants, respectively. The shaded and covered flowers were visited by significantly fewer pollinators than sunlit and open flowers in the field. However, three major pollinator species responded differently to shading and covering. Significant pollen limitation reduced seed set in covered flowers, and shaded flowers produced fewer seeds. Pollen removal from the anthers was not influenced by shading or covering. Our study demonstrates the negative effects of covering on pollinator visits and seed production. It also elucidates the negative effects of shading on reproductive success in L. zollingeri, which depends on managed semi-natural conditions. Land management abandonment, which has increased shaded and covered conditions in artificial forest edge meadows and open forest floors, might promote a rapid reduction in the populations of such dwarf plants.
Collapse
Affiliation(s)
- A Ushimaru
- Graduate School of Human Development and Environment, Kobe University, Nada, Kobe, Japan
- Faculty of Human Development, Kobe University, Nada, Kobe, Japan
| | - I Rin
- Faculty of Human Development, Kobe University, Nada, Kobe, Japan
| | - K R Katsuhara
- Graduate School of Human Development and Environment, Kobe University, Nada, Kobe, Japan
| |
Collapse
|
36
|
Treviño Murphy L, Engelman S, Neff JL, Jha S. The Native Bees of Texas: Evaluating the Benefits of a Public Engagement Course. INSECTS 2021; 12:702. [PMID: 34442267 PMCID: PMC8396608 DOI: 10.3390/insects12080702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/21/2021] [Accepted: 07/29/2021] [Indexed: 11/23/2022]
Abstract
Declines in native bee communities due to forces of global change have become an increasing public concern. Despite this heightened interest, there are few publicly available courses on native bees, and little understanding of how participants might benefit from such courses. In October of 2018 and 2019, we taught the 'Native Bees of Texas' course to the public at The University of Texas at Austin Lady Bird Johnson Wildflower Center botanical gardens in an active learning environment with slide-based presentations, printed photo-illustrated resources, and direct insect observations. In this study, we evaluated course efficacy and learning outcomes with a pre/post-course test, a survey, and open-ended feedback, focused on quality improvement findings. Overall, participants' test scores increased significantly, from 60% to 87% correct answers in 2018 and from 64% to 87% in 2019, with greater post-course differences in ecological knowledge than in identification skills. Post-course, the mean of participants' bee knowledge self-ratings was 4.56 on a five-point scale. The mean of participants' ratings of the degree to which they attained the course learning objectives was 4.43 on a five-point scale. Assessment results provided evidence that the course enriched participants' knowledge of native bee ecology and conservation and gave participants a basic foundation in bee identification. This highlights the utility of systematic course evaluations in public engagement efforts related to biodiversity conservation.
Collapse
Affiliation(s)
- Laurel Treviño Murphy
- Outreach Program, Department of Integrative Biology, The University of Texas at Austin, 401 Biological Laboratories, 205 W 24th Street, Austin, TX 78712, USA
| | - Shelly Engelman
- Research and Evaluation, Custom EduEval LLC, Austin, TX 78749, USA;
| | - John L. Neff
- Central Texas Melittological Institute, Austin, TX 78731, USA;
| | - Shalene Jha
- Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA;
| |
Collapse
|
37
|
Gemmill-Herren B, Garibaldi LA, Kremen C, Ngo HT. Building effective policies to conserve pollinators: translating knowledge into policy. CURRENT OPINION IN INSECT SCIENCE 2021; 46:64-71. [PMID: 33667692 DOI: 10.1016/j.cois.2021.02.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/14/2021] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
Pollination management recommendations are becoming increasingly precise, context-specific and knowledge-intensive. Pollination is a service delivered across landscapes, entailing policy constructs across agricultural landscapes. Diversified farming practices effectively promote pollination services. Yet it remains difficult to secure large-scale uptake by farming communities. A strong foundation upon which to base policy formulation stems from respecting the perspective of farmers and local communities on the need to conserve pollinators, alongside scientific understanding. Ecological intensification resonates with both indigenous knowledge, local communities and scientific understanding. It emphasizes that the regulating functions of nature require both landscape-level agroecosystem design and recognition of the complexity of agricultural systems. Facilitating ecological intensification across landscapes requires collective decision-making, with institutional innovation in local structures and food system governance.
Collapse
Affiliation(s)
- Barbara Gemmill-Herren
- Prescott College, 220 Grove Ave., Prescott, AZ 86301, USA; World Agroforestry Center, United Nations Avenue, Gigiri, Nairobi, Kenya.
| | - Lucas A Garibaldi
- Universidad Nacional de Río Negro, Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural, San Carlos de Bariloche, Río Negro, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural, San Carlos de Bariloche, Río Negro, Argentina
| | - Claire Kremen
- Institute for Resources, Environment and Sustainability and Department of Zoology, 2202 Main Mall, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Hien T Ngo
- Food and Agriculture Organization of the United Nations, Office of Climate Change, Biodiversity and Environment, 00153 Rome, Italy
| |
Collapse
|
38
|
Benvenuti S, Mazzoncini M. Entomogamy in wildflowers: What level of pollinator biodiversity is required? ACTA OECOLOGICA 2021. [DOI: 10.1016/j.actao.2021.103737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
39
|
Using Matching Traits to Study the Impacts of Land-Use Intensification on Plant-Pollinator Interactions in European Grasslands: A Review. INSECTS 2021; 12:insects12080680. [PMID: 34442246 PMCID: PMC8396669 DOI: 10.3390/insects12080680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/17/2021] [Accepted: 07/23/2021] [Indexed: 11/29/2022]
Abstract
Simple Summary Permanent grasslands are main habitats for many plant species and pollinators. Their destruction as well as their intensification has a major impact on plant and pollinator biodiversity, which has a cascading effect on pollination. However, we lack an understanding of these effects, thereby limiting our ability to predict them. In this review, we synthesised the literature on the mechanisms behind this cascade to provide new insights into the relationship between land-use intensification and pollination. By matching functional traits that mediate the relationship between the two trophic levels, we identified major knowledge gaps about how land-use intensification affects plant–pollinator interactions and how it favours plants with generalised floral traits, which are likely harmful to pollination. Abstract Permanent grasslands are suitable habitats for many plant and animal species, among which are pollinating insects that provide a wide range of ecosystem services. A global crisis in pollination ecosystem service has been highlighted in recent decades, partly the result of land-use intensification. At the grassland scale, however, the underlying mechanisms of land-use intensification that affect plant–pollinator interactions and pollination remain understudied. In this review, we first synthesise the literature to provide new insights into the relationships between land-use intensification and pollination by using matching community and interaction traits. We then identify knowledge gaps and summarise how land-use intensification of grassland influences floral traits that may in turn be associated with modifications to pollinator matching traits. Last, we summarise how these modifications may affect pollination function on permanent grasslands. Overall, land-use intensification may lead to a shift in flower colour, a decrease in mean nectar tube depth and a decrease in reward production and pollen quality at the community level. This, in turn, may generate a decrease in pollinator mouthparts length and body size, that may favour pollinators that require a low amount of floral reward. We found no study citing the effect of land-use intensification on volatile organic compounds emitted by flowers despite the importance of these molecules in pollinator community composition. Overall, our review highlighted major knowledge gaps about the effects of land-use intensification on plant–pollinator interactions, and suggests that land-use intensification could favour plants with generalised floral traits that adversely affect pollination.
Collapse
|
40
|
Fründ J. Dissimilarity of species interaction networks: how to partition rewiring and species turnover components. Ecosphere 2021. [DOI: 10.1002/ecs2.3653] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Jochen Fründ
- Biometry and Environmental System Analysis Faculty of Environment and Natural Resources University of Freiburg Tennenbacher Straße 4 Freiburg 79106 Germany
| |
Collapse
|
41
|
Dubois T, Pasquaretta C, Barron AB, Gautrais J, Lihoreau M. A model of resource partitioning between foraging bees based on learning. PLoS Comput Biol 2021; 17:e1009260. [PMID: 34319987 PMCID: PMC8351995 DOI: 10.1371/journal.pcbi.1009260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 08/09/2021] [Accepted: 07/07/2021] [Indexed: 12/19/2022] Open
Abstract
Central place foraging pollinators tend to develop multi-destination routes (traplines) to exploit patchily distributed plant resources. While the formation of traplines by individual pollinators has been studied in detail, how populations of foragers use resources in a common area is an open question, difficult to address experimentally. We explored conditions for the emergence of resource partitioning among traplining bees using agent-based models built from experimental data of bumblebees foraging on artificial flowers. In the models, bees learn to develop routes as a consequence of feedback loops that change their probabilities of moving between flowers. While a positive reinforcement of movements leading to rewarding flowers is sufficient for the emergence of resource partitioning when flowers are evenly distributed, the addition of a negative reinforcement of movements leading to unrewarding flowers is necessary when flowers are patchily distributed. In environments with more complex spatial structures, the negative experiences of individual bees on flowers favour spatial segregation and efficient collective foraging. Our study fills a major gap in modelling pollinator behaviour and constitutes a unique tool to guide future experimental programs.
Collapse
Affiliation(s)
- Thibault Dubois
- Research Centre on Animal Cognition (CRCA), Centre for Integrative Biology (CBI); CNRS, University Paul Sabatier–Toulouse III, Toulouse, France
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Cristian Pasquaretta
- Research Centre on Animal Cognition (CRCA), Centre for Integrative Biology (CBI); CNRS, University Paul Sabatier–Toulouse III, Toulouse, France
| | - Andrew B. Barron
- Department of Biological Sciences, Macquarie University, Sydney, Australia
| | - Jacques Gautrais
- Research Centre on Animal Cognition (CRCA), Centre for Integrative Biology (CBI); CNRS, University Paul Sabatier–Toulouse III, Toulouse, France
| | - Mathieu Lihoreau
- Research Centre on Animal Cognition (CRCA), Centre for Integrative Biology (CBI); CNRS, University Paul Sabatier–Toulouse III, Toulouse, France
| |
Collapse
|
42
|
Dehling DM, Bender IMA, Blendinger PG, Böhning‐Gaese K, Muñoz MC, Neuschulz EL, Quitián M, Saavedra F, Santillán V, Schleuning M, Stouffer DB. Specialists and generalists fulfil important and complementary functional roles in ecological processes. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13815] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- D. Matthias Dehling
- Centre for Integrative Ecology School of Biological Sciences University of Canterbury Christchurch New Zealand
- Swiss Federal Research Institute WSL Birmensdorf Switzerland
| | - Irene M. A. Bender
- Instituto de Ecología Regional Universidad Nacional de Tucumán‐Consejo Nacional de Investigaciones Científicas y Técnicas Tucumán Argentina
- Senckenberg Biodiversity and Climate Research Centre (SBiK‐F) Frankfurt am Main Germany
| | - Pedro G. Blendinger
- Instituto de Ecología Regional Universidad Nacional de Tucumán‐Consejo Nacional de Investigaciones Científicas y Técnicas Tucumán Argentina
| | - Katrin Böhning‐Gaese
- Senckenberg Biodiversity and Climate Research Centre (SBiK‐F) Frankfurt am Main Germany
- Institute for Ecology, Evolution and Diversity Goethe University Frankfurt Frankfurt am Main Germany
| | - Marcia C. Muñoz
- Programa de Biología Universidad de La Salle Bogotá Colombia
| | - Eike L. Neuschulz
- Senckenberg Biodiversity and Climate Research Centre (SBiK‐F) Frankfurt am Main Germany
| | - Marta Quitián
- Systematic Zoology Laboratory Tokyo Metropolitan University (TMU) Tokyo Japan
| | - Francisco Saavedra
- Instituto de Ecología Facultad de Ciencias Puras y Naturales Universidad Mayor de San Andrés La Paz Bolivia
| | - Vinicio Santillán
- Centro de Investigación, Innovación y Transferencia de Tecnología (CIITT) Universidad Católica de Cuenca Cuenca Ecuador
| | - Matthias Schleuning
- Senckenberg Biodiversity and Climate Research Centre (SBiK‐F) Frankfurt am Main Germany
| | - Daniel B. Stouffer
- Centre for Integrative Ecology School of Biological Sciences University of Canterbury Christchurch New Zealand
| |
Collapse
|
43
|
Vasiliev D, Greenwood S. The role of climate change in pollinator decline across the Northern Hemisphere is underestimated. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145788. [PMID: 33618305 DOI: 10.1016/j.scitotenv.2021.145788] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 02/02/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Pollinator biodiversity loss occurs at unprecedented rates globally, with particularly sharp declines documented in the North Temperate Zone. There is currently no consensus on the main drivers of the decline. Although climate change is expected to drive biodiversity loss in the future, current warming is often suggested to have positive impacts on pollinator assemblages in higher latitudes. Consequently, pollinator conservation initiatives in Europe and the USA tend to lack climate adaptation initiatives, an omission of which may be risky if climate change has significant negative impacts on pollinators. To gain an understanding of the impacts of climate change on pollinator biodiversity in the Northern Hemisphere, we conducted a literature review on genetic, species and community level diversity. Our findings suggest that global heating most likely causes homogenization of pollinator assemblages at all levels of pollinator biodiversity, making them less resilient to future stochasticity. Aspects of biodiversity that are rarely measured (e.g. genetic diversity, β-diversity, species evenness) tend to be most affected, while some dimensions of climate change, such as fluctuations in winter weather conditions, changes in the length of the vegetational season and increased frequency of extreme weather events, that seldom receive attention in empirical studies, tend to be particularly detrimental to pollinators. Negative effects of global heating on pollinator biodiversity are most likely exacerbated by homogenous and fragmented landscapes, widespread across Europe and the US, which limit opportunities for range-shifts and reduce micro-climatic buffering. This suggests the need for conservation initiatives to focus on increasing landscape connectivity and heterogeneity at multiple spatial scales.
Collapse
Affiliation(s)
- Denis Vasiliev
- Biodiversity, Wildlife and Ecosystem Health MSc, Biomedical Sciences, The University of Edinburgh, 1 George Square, Edinburgh EH8 9JZ, United Kingdom of Great Britain and Northern Ireland.
| | - Sarah Greenwood
- Biodiversity, Wildlife and Ecosystem Health MSc, Biomedical Sciences, The University of Edinburgh, 1 George Square, Edinburgh EH8 9JZ, United Kingdom of Great Britain and Northern Ireland
| |
Collapse
|
44
|
Guo PF, Wang MQ, Orr M, Li Y, Chen JT, Zhou QS, Staab M, Fornoff F, Chen GH, Zhang NL, Klein AM, Zhu CD. Tree diversity promotes predatory wasps and parasitoids but not pollinator bees in a subtropical experimental forest. Basic Appl Ecol 2021. [DOI: 10.1016/j.baae.2021.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
45
|
Gómez-Creutzberg C, Lagisz M, Nakagawa S, Brockerhoff EG, Tylianakis JM. Consistent trade-offs in ecosystem services between land covers with different production intensities. Biol Rev Camb Philos Soc 2021; 96:1989-2008. [PMID: 34031979 PMCID: PMC8519091 DOI: 10.1111/brv.12734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 05/02/2021] [Accepted: 05/06/2021] [Indexed: 12/29/2022]
Abstract
Sustaining multiple ecosystem services across a landscape requires an understanding of how consistently services are shaped by different categories of land uses. Yet, this understanding is generally constrained by the availability of fine‐resolution data for multiple services across large areas and the spatial variability of land‐use effects on services. We systematically surveyed published literature for New Zealand (1970–2015) to quantify the supply of 17 non‐production services across 25 land covers (as a proxy for land use). We found a consistent trade‐off in the services supplied by anthropogenic land covers with a high production intensity (e.g. cropping) versus those with extensive or no production. By contrast, forest cover was not associated with any distinct patterns of service supply. By drawing on existing research findings, we reveal complementarity and redundancy (potentially influencing resilience) in service supply from different land covers. This will guide practitioners in shaping land systems that sustainably support human well‐being.
Collapse
Affiliation(s)
- Carla Gómez-Creutzberg
- Centre for Integrative Ecology, University of Canterbury, Christchurch, 8140, New Zealand
| | - Malgorzata Lagisz
- Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Shinichi Nakagawa
- Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Eckehard G Brockerhoff
- Scion (New Zealand Forest Research Institute), Christchurch, 8440, New Zealand.,Swiss Federal Research Institute WSL, Zürcherstrasse 111, Birmensdorf, CH-8903, Switzerland
| | - Jason M Tylianakis
- Centre for Integrative Ecology, University of Canterbury, Christchurch, 8140, New Zealand
| |
Collapse
|
46
|
Prendergast KS, Ollerton J. Impacts of the introduced European honeybee on Australian bee‐flower network properties in urban bushland remnants and residential gardens. AUSTRAL ECOL 2021. [DOI: 10.1111/aec.13040] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Kit S. Prendergast
- School of Molecular and Life Sciences Curtin University Perth, Bentley Western Australia 6845 Australia
| | - Jeff Ollerton
- Faculty of Arts, Science and Technology University of Northampton Northampton UK
| |
Collapse
|
47
|
Cervantes-Loreto A, Ayers CA, Dobbs EK, Brosi BJ, Stouffer DB. The context dependency of pollinator interference: How environmental conditions and co-foraging species impact floral visitation. Ecol Lett 2021; 24:1443-1454. [PMID: 33942455 DOI: 10.1111/ele.13765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/24/2021] [Accepted: 04/03/2021] [Indexed: 11/29/2022]
Abstract
Animals often change their behaviour in the presence of other species and the environmental context they experience, and these changes can substantially modify the course their populations follow. In the case of animals involved in mutualistic interactions, it is still unclear how to incorporate the effects of these behavioural changes into population dynamics. We propose a framework for using pollinator functional responses to examine the roles of pollinator-pollinator interactions and abiotic conditions in altering the times between floral visits of a focal pollinator. We then apply this framework to a unique foraging experiment with different models that allow resource availability and sublethal exposure to a neonicotinoid pesticide to modify how pollinators forage alone and with co-foragers. We found that all co-foragers interfere with the focal pollinator under at least one set of abiotic conditions; for most species, interference was strongest at higher levels of resource availability and with pesticide exposure. Overall our results highlight that density-dependent responses are often context-dependent themselves.
Collapse
Affiliation(s)
- Alba Cervantes-Loreto
- Centre for Integrative Ecology, School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | - Carolyn A Ayers
- Department of Environmental Sciences, Emory University, Atlanta, GA, USA
| | - Emily K Dobbs
- Department of Environmental Sciences, Emory University, Atlanta, GA, USA
| | - Berry J Brosi
- Department of Biology, University of Washington, Seattle, WA, USA
| | - Daniel B Stouffer
- Centre for Integrative Ecology, School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| |
Collapse
|
48
|
Semmler RF, Brandl SJ, Keith SA, Bellwood DR. Fine-scale foraging behavior reveals differences in the functional roles of herbivorous reef fishes. Ecol Evol 2021; 11:4898-4908. [PMID: 33976857 PMCID: PMC8093660 DOI: 10.1002/ece3.7398] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 11/19/2022] Open
Abstract
Efforts to understand and protect ecosystem functioning have put considerable emphasis on classifying species according to the functions they perform. However, coarse classifications based on diet or feeding mode often oversimplify species' contributions to ecological processes. Behavioral variation among superficially similar species is easily missed but could indicate important differences in competitive interactions and the spatial scale at which species deliver their functions. To test the extent to which behavior can vary within existing functional classifications, we investigate the diversity of foraging movements in three herbivorous coral reef fishes across two functional groups. We find significant variation in foraging movements and spatial scales of operation between species, both within and across existing functional groups. Specifically, we show that movements and space use range from low frequency foraging bouts separated by short distances and tight turns across a small area, to high frequency, far-ranging forays separated by wide sweeping turns. Overall, we add to the burgeoning evidence that nuanced behavioral differences can underpin considerable complementarity within existing functional classifications, and that species assemblages may be considerably less redundant than previously thought.
Collapse
Affiliation(s)
| | - Simon J. Brandl
- Department of Marine ScienceMarine Science InstituteUniversity of Texas AustinPort AransasTXUSA
- ARC Centre of Excellence for Coral Reef StudiesJames Cook UniversityTownsvilleQLDAustralia
- College of Science and EngineeringJames Cook UniversityTownsvilleQLDAustralia
| | - Sally A. Keith
- Lancaster Environment CentreLancaster UniversityLancasterUK
| | - David R. Bellwood
- ARC Centre of Excellence for Coral Reef StudiesJames Cook UniversityTownsvilleQLDAustralia
- College of Science and EngineeringJames Cook UniversityTownsvilleQLDAustralia
| |
Collapse
|
49
|
Landscape and Local Drivers Affecting Flying Insects along Fennel Crops ( Foeniculum vulgare, Apiaceae) and Implications for Its Yield. INSECTS 2021; 12:insects12050404. [PMID: 33946366 PMCID: PMC8146141 DOI: 10.3390/insects12050404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 11/16/2022]
Abstract
Agricultural landscapes are increasingly characterized by intensification and habitat losses. Landscape composition and configuration are known to mediate insect abundance and richness. In the context of global insect decline, and despite 75% of crops being dependent on insects, there is still a gap of knowledge about the link between pollinators and aromatic crops. Fennel (Foeniculum vulgare) is an aromatic plant cultivated in the South of France for its essential oil, which is of great economic interest. Using pan-traps, we investigated the influence of the surrounding habitats at landscape scale (semi-natural habitat proportion and vicinity, landscape configuration) and local scale agricultural practices (insecticides and patch size) on fennel-flower-visitor abundance and richness, and their subsequent impact on fennel essential oil yield. We found that fennel may to be a generalist plant species. We did not find any effect of intense local management practices on insect abundance and richness. Landscape configuration and proximity to semi-natural habitat were the main drivers of flying insect family richness. This richness positively influenced fennel essential oil yield. Maintaining a complex configuration of patches at the landscape scale is important to sustain insect diversity and crop yield.
Collapse
|
50
|
Moroń D, Marjańska E, Skórka P, Lenda M, Woyciechowski M. Invader–pollinator paradox: Invasive goldenrods benefit from large size pollinators. DIVERS DISTRIB 2021. [DOI: 10.1111/ddi.13221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Dawid Moroń
- Institute of Systematics and Evolution of Animals Polish Academy of Sciences Kraków Poland
| | - Emilia Marjańska
- Institute of Environmental Sciences Jagiellonian University Kraków Poland
| | - Piotr Skórka
- Institute of Nature Conservation Polish Academy of Sciences Kraków Poland
| | - Magdalena Lenda
- Institute of Nature Conservation Polish Academy of Sciences Kraków Poland
- School of Biological Sciences The University of Queensland Brisbane QLD Australia
| | | |
Collapse
|