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van der Voort GE, Gilmore SR, Gorrell JC, Janes JK. Continuous video capture, and pollinia tracking, in Platanthera (Orchidaceae) reveal new insect visitors and potential pollinators. PeerJ 2022; 10:e13191. [PMID: 35573171 PMCID: PMC9097665 DOI: 10.7717/peerj.13191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 03/08/2022] [Indexed: 01/12/2023] Open
Abstract
Orchids often have specific pollinators, which should provide reproductive isolation, yet many produce natural hybrids. Platanthera dilatata and P. stricta differ in floral morphology but often co-occur, overlap in flowering, and are reputed parents of P. xestesii. We used motion-triggered video detection units to monitor floral visitors of P. dilatata and P. stricta on Vancouver Island, Canada. Pollinia removal in P. dilatata was observed using histochemical staining, and cross-pollinations were performed to determine compatibility. From 1,152 h, 753 videos were recorded; 655 contained insects and 91 contained arachnids. Bumblebees, butterflies, and moths removed pollinia from P. dilatata. No pollinia removal was observed from P. stricta. Five videos showed insects moving between Platanthera species. Pollinia removal rates were low. Hand-pollinations resulted in capsule development and seed production. This study adds to the known diversity of insects interacting with these orchids, and highlights regional differences in floral visitors.
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Affiliation(s)
- Genevieve E. van der Voort
- Department of Ecosystem Science and Management, University of Northern British Columbia, Prince George, BC, Canada,Biology, Vancouver Island University, Nanaimo, BC, Canada
| | | | | | - Jasmine K. Janes
- Department of Ecosystem Science and Management, University of Northern British Columbia, Prince George, BC, Canada,Biology, Vancouver Island University, Nanaimo, BC, Canada,Species Survival Commission, Orchid Specialist Group, North America, IUCN, Nanaimo, British Columbia, Canada
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2
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Junggebauer A, Hartke TR, Ramos D, Schaefer I, Buchori D, Hidayat P, Scheu S, Drescher J. Changes in diversity and community assembly of jumping spiders (Araneae: Salticidae) after rainforest conversion to rubber and oil palm plantations. PeerJ 2021; 9:e11012. [PMID: 33717710 PMCID: PMC7937343 DOI: 10.7717/peerj.11012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 02/05/2021] [Indexed: 11/20/2022] Open
Abstract
Rainforest conversion into monoculture plantations results in species loss and community shifts across animal taxa. The effect of such conversion on the role of ecophysiological properties influencing communities, and conversion effects on phylogenetic diversity and community assembly mechanisms, however, are rarely studied in the same context. Here, we compare salticid spider (Araneae: Salticidae) communities between canopies of lowland rainforest, rubber agroforest (“jungle rubber”) and monoculture plantations of rubber or oil palm, sampled in a replicated plot design in Jambi Province, Sumatra, Indonesia. Overall, we collected 912 salticid spider individuals and sorted them to 70 morphospecies from 21 genera. Salticid richness was highest in jungle rubber, followed by rainforest, oil palm and rubber, but abundance of salticids did not differ between land-use systems. Community composition was similar in jungle rubber and rainforest but different from oil palm and rubber, which in turn were different from each other. The four investigated land-use systems differed in aboveground plant biomass, canopy openness and land use intensity, which explained 12% of the observed variation in canopy salticid communities. Phylogenetic diversity based on ~850 bp 28S rDNA fragments showed similar patterns as richness, that is, highest in jungle rubber, intermediate in rainforest, and lowest in the two monoculture plantations. Additionally, we found evidence for phylogenetic clustering of salticids in oil palm, suggesting that habitat filtering is an important factor shaping salticid spider communities in monoculture plantations. Overall, our study offers a comprehensive insight into the mechanisms shaping communities of arthropod top predators in canopies of tropical forest ecosystems and plantations, combining community ecology, environmental variables and phylogenetics across a land-use gradient in tropical Asia.
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Affiliation(s)
- André Junggebauer
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Tamara R Hartke
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Daniel Ramos
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Ina Schaefer
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Damayanti Buchori
- Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University, Bogor, Indonesia.,Center for Transdisciplinary and Sustainability Sciences, IPB University, Bogor, Indonesia
| | - Purnama Hidayat
- Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University, Bogor, Indonesia
| | - Stefan Scheu
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany.,Centre of Biodiversity and Sustainable Land Use, University of Göttingen, Göttingen, Germany
| | - Jochen Drescher
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
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3
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Hultine KR, Allan GJ, Blasini D, Bothwell HM, Cadmus A, Cooper HF, Doughty CE, Gehring CA, Gitlin AR, Grady KC, Hull JB, Keith AR, Koepke DF, Markovchick L, Corbin Parker JM, Sankey TT, Whitham TG. Adaptive capacity in the foundation tree species Populus fremontii: implications for resilience to climate change and non-native species invasion in the American Southwest. CONSERVATION PHYSIOLOGY 2020; 8:coaa061. [PMID: 32685164 PMCID: PMC7359000 DOI: 10.1093/conphys/coaa061] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 05/28/2020] [Accepted: 06/14/2020] [Indexed: 05/29/2023]
Abstract
Populus fremontii (Fremont cottonwood) is recognized as one of the most important foundation tree species in the southwestern USA and northern Mexico because of its ability to structure communities across multiple trophic levels, drive ecosystem processes and influence biodiversity via genetic-based functional trait variation. However, the areal extent of P. fremontii cover has declined dramatically over the last century due to the effects of surface water diversions, non-native species invasions and more recently climate change. Consequently, P. fremontii gallery forests are considered amongst the most threatened forest types in North America. In this paper, we unify four conceptual areas of genes to ecosystems research related to P. fremontii's capacity to survive or even thrive under current and future environmental conditions: (i) hydraulic function related to canopy thermal regulation during heat waves; (ii) mycorrhizal mutualists in relation to resiliency to climate change and invasion by the non-native tree/shrub, Tamarix; (iii) phenotypic plasticity as a mechanism for coping with rapid changes in climate; and (iv) hybridization between P. fremontii and other closely related Populus species where enhanced vigour of hybrids may preserve the foundational capacity of Populus in the face of environmental change. We also discuss opportunities to scale these conceptual areas from genes to the ecosystem level via remote sensing. We anticipate that the exploration of these conceptual areas of research will facilitate solutions to climate change with a foundation species that is recognized as being critically important for biodiversity conservation and could serve as a model for adaptive management of arid regions in the southwestern USA and around the world.
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Affiliation(s)
- Kevin R Hultine
- Department of Research, Conservation and Collections, Desert Botanical Garden, 1201 North Galvin Parkway, Phoenix, AZ 85008, USA
| | - Gerard J Allan
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Davis Blasini
- School of Life Sciences, Arizona State University, 427 East Tyler Mall, Tempe, AZ 85281, USA
| | - Helen M Bothwell
- Research School of Biology, Australian National University, 134 Linnaeus Way, Canberra ACT2601, Australia
| | - Abraham Cadmus
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Hillary F Cooper
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Chris E Doughty
- School of Informatics, Computing, and Cyber Systems, Northern Arizona University, 1295 South Knoles Drive, Flagstaff, AZ 86011, USA
| | - Catherine A Gehring
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Alicyn R Gitlin
- Sierra Club – Grand Canyon Chapter, 514 West Roosevelt Street, Phoenix, AZ 85003, USA
| | - Kevin C Grady
- School of Forestry, Northern Arizona University, East Pine Knoll Drive, Flagstaff, AZ 86011, USA
| | - Julia B Hull
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Arthur R Keith
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Dan F Koepke
- Department of Research, Conservation and Collections, Desert Botanical Garden, 1201 North Galvin Parkway, Phoenix, AZ 85008, USA
| | - Lisa Markovchick
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Jackie M Corbin Parker
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
| | - Temuulen T Sankey
- School of Informatics, Computing, and Cyber Systems, Northern Arizona University, 1295 South Knoles Drive, Flagstaff, AZ 86011, USA
| | - Thomas G Whitham
- Department of Biological Sciences and Merriam-Powell Center for Environmental Research, Northern Arizona University, 617 South Beaver Drive, Flagstaff, AZ 86011, USA
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Axelsson EP, Senior JK. The extended consequences of genetic conductivity: Mating distance affects community phenotypes in Norway spruce. Ecol Evol 2018; 8:11645-11655. [PMID: 30598763 PMCID: PMC6303695 DOI: 10.1002/ece3.4616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 11/11/2022] Open
Abstract
Anthropogenic landscape-level alterations such as habitat fragmentation and long distance translocation of genetic material are currently altering the genetic connectivity and structure of forest tree populations globally. As the susceptibility of individual trees to dependent organisms is often genetically determined, it is possible that these genetic changes may extend beyond individuals to affect associated communities. To test this, we examined how variation in crossing distance among the progeny of 18 controlled crosses of Norway spruce (Picea abies) populations occurring across central Sweden affected chemical defense, and subsequently, a small community of galling Adelges aphids infecting planted trees at two common garden trails. Although crossing distance did not influence growth, vitality or reproduction in the studied population, it did influence the expression of one candidate defensive chemical compound, apigenin, which was found in higher concentrations within outcrossed trees. We also show that this variation in apigenin induced by crossing distance correlated with susceptibility to one member of the galling community but not the other. Furthermore, the effect of crossing distance on galling communities and the general susceptibility of Norway spruce to infection also varied with environment. Specifically, in the more benign environment, inbred trees suffered greater gall infection than outcrossed trees, which is contrary to general predictions that the effects of inbreeding should be more pronounced in harsher environments. These findings suggest that the effects of variation in crossing distance in forest trees can extend beyond the individual to influence whole communities.
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Affiliation(s)
- Erik Petter Axelsson
- Department of Wildlife, Fish and Environmental StudiesSwedish University of Agricultural SciencesSkogsmarksgrändUmeå
| | - John Keith Senior
- Department of Wildlife, Fish and Environmental StudiesSwedish University of Agricultural SciencesSkogsmarksgrändUmeå
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Jarvis KJ, Allan GJ, Craig AJ, Beresic-Perrins RK, Wimp G, Gehring CA, Whitham TG. Arthropod communities on hybrid and parental cottonwoods are phylogenetically structured by tree type: Implications for conservation of biodiversity in plant hybrid zones. Ecol Evol 2017; 7:5909-5921. [PMID: 28808554 PMCID: PMC5551273 DOI: 10.1002/ece3.3146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/17/2017] [Indexed: 02/03/2023] Open
Abstract
Although hybridization in plants has been recognized as an important pathway in plant speciation, it may also affect the ecology and evolution of associated communities. Cottonwood species (Populus angustifolia and P. fremontii) and their naturally occurring hybrids are known to support different plant, animal, and microbial communities, but no studies have examined community structure within the context of phylogenetic history. Using a community composed of 199 arthropod species, we tested for differences in arthropod phylogenetic patterns within and among hybrid and parental tree types in a common garden. Three major patterns emerged. (1) Phylogenetic diversity (PD) was significantly different between arthropod communities on hybrids and Fremont cottonwood when pooled by tree type. (2) Mean phylogenetic distance (MPD) and net relatedness index (NRI) indicated that communities on hybrid trees were significantly more phylogenetically overdispersed than communities on either parental tree type. (3) Community distance (Dpw) indicated that communities on hybrids were significantly different than parental species. Our results show that arthropod communities on parental and hybrid cottonwoods exhibit significantly different patterns of phylogenetic structure. This suggests that arthropod community assembly is driven, in part, by plant-arthropod interactions at the level of cottonwood tree type. We discuss potential hypotheses to explain the effect of plant genetic dissimilarity on arthropod phylogenetic community structure, including the role of competition and environmental filtering. Our findings suggest that cottonwood species and their hybrids function as evolutionarily significant units (ESUs) that affect the assembly and composition of associated arthropod communities and deserve high priority for conservation.
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Affiliation(s)
- Karl J Jarvis
- School of Forestry Northern Arizona University Flagstaff AZ USA.,Biology Department Southern Utah University Cedar City UT USA
| | - Gerard J Allan
- Department of Biological Sciences Northern Arizona University Flagstaff AZ USA.,Merriam-Powell Center for Environmental Research Flagstaff AZ USA
| | - Ashley J Craig
- Department of Biological Sciences Northern Arizona University Flagstaff AZ USA
| | | | - Gina Wimp
- Department of Biology Georgetown University Washington DC USA
| | - Catherine A Gehring
- Department of Biological Sciences Northern Arizona University Flagstaff AZ USA.,Merriam-Powell Center for Environmental Research Flagstaff AZ USA
| | - Thomas G Whitham
- Department of Biological Sciences Northern Arizona University Flagstaff AZ USA.,Merriam-Powell Center for Environmental Research Flagstaff AZ USA
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