1
|
Bird JP, Fuller RA, Shaw JD. Patterns of recovery in extant and extirpated seabirds after the world's largest multipredator eradication. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024; 38:e14239. [PMID: 38375602 DOI: 10.1111/cobi.14239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 11/27/2023] [Accepted: 12/02/2023] [Indexed: 02/21/2024]
Abstract
Eradicating invasive predators from islands can result in substantial recovery of seabirds, but the mechanisms that drive population changes remain poorly understood. Meta-analyses have recently revealed that immigration is surprisingly important to the recovery of philopatric seabirds, but it is not known whether dispersal and philopatry interact predictably to determine rates of population growth and changes of distribution. We used whole-island surveys and long-term monitoring plots to study the abundance, distribution, and trends of 4 burrowing seabird species on Macquarie Island, Australia, to examine the legacy impacts of invasive species and ongoing responses to the world's largest eradication of multiple species of vertebrates. Wekas (Gallirallus australis) were eradicated in 1988; cats (Felis catus) in 2001; and rabbits (Oryctolagus cuniculus), black rats (Rattus rattus), and mice (Mus mus) in 2011-2014. We compared surveys from 1976-1979 and 2017-2018 and monitoring from the 1990s and 2000s onward. Antarctic prions (Pachyptila desolata) and white-headed petrels (Pterodroma lessonii) increased ∼1% per year. Blue petrels (Halobaena caerulea) and gray petrels (Procellaria cinerea) recolonized following extirpation from the main island in the 1900s but remained spatially and numerically rare in 2018. However, they increased rapidly at 14% and 10% per year, respectively, since cat eradication in 2001. Blue and gray petrel recolonization occurred on steep, dry, west-facing slopes close to ridgelines at low elevation (i.e., high-quality petrel habitat). They overlapped <5% with the distribution of Antarctic prion and white-headed petrels which occurred in suboptimal shallow, wet, east-facing slopes at high elevation. We inferred that the speed of population growth of recolonizing species was related to their numerically smaller starting size compared with the established species and was driven by immigration and selection of ideal habitat.
Collapse
Affiliation(s)
- Jeremy P Bird
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Richard A Fuller
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland, Australia
| | - Justine D Shaw
- School of Biological Sciences, The University of Queensland, St Lucia, Queensland, Australia
| |
Collapse
|
2
|
Peng Q, Yang Y, Ou W, Wei L, Li Z, Deng X, Gao Q. The characteristics and environmental significance of BVOCs released by aquatic macrophytes. CHEMOSPHERE 2024; 361:142574. [PMID: 38852633 DOI: 10.1016/j.chemosphere.2024.142574] [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: 11/10/2022] [Revised: 05/07/2024] [Accepted: 06/07/2024] [Indexed: 06/11/2024]
Abstract
Biogenic volatile organic compounds (BVOCs) emitted by plants serve crucial biological functions and potentially impact atmospheric environment and global carbon cycling. Despite their significance, BVOC emissions from aquatic macrophytes have been relatively understudied. In this study, for the first time we identified there were 68 major BVOCs released from 34 common aquatic macrophytes, and these compounds referred to alcohols, aldehydes, alkanes, alkenes, arenes, ethers, furans, ketones, phenol. For type of BVOC emissions from different life form and phylogenetic group of aquatic macrophytes, 34 of the 68 BVOCs from emergent and submerged macrophytes are classified into alkene and alcohol compounds, over 50% BVOCs from dicotyledon and monocotyledon belong to alcohol and arene compounds. Charophyte and pteridophyte emitted significantly fewer BVOCs than dicotyledon and monocotyledon, and each of them only released 12 BVOCs. These BVOCs may be of great importance for the growth and development of macrophytes, because many BVOCs, such as azulene, (E)-β-farnesene, and dimethyl sulfide are proved to play vital roles in plant growth, defense, and information transmission. Our results confirmed that both life form and phylogenetic group of aquatic macrophytes had significantly affected the BVOC emissions form macrophytes, and suggested that the intricate interplay of internal and external factors that shape BVOC emissions from aquatic macrophytes. Thus, further studies are urgently needed to investigate the influence factors and ecological function of BVOCs released by macrophytes within aquatic ecosystem.
Collapse
Affiliation(s)
- Qiutong Peng
- Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China
| | - Yujing Yang
- Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China
| | - Wenhui Ou
- Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China
| | - Lifei Wei
- Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China
| | - Zhongqiang Li
- Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China.
| | - Xuwei Deng
- Donghu Experimental Station of Lake Ecosystems, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China.
| | - Qiang Gao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China
| |
Collapse
|
3
|
Valentine K, Hughes C, Boxall A. Plastic Litter Emits the Foraging Infochemical Dimethyl Sulfide after Submersion in Freshwater Rivers. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:1485-1496. [PMID: 38661488 DOI: 10.1002/etc.5880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/11/2024] [Accepted: 04/01/2024] [Indexed: 04/26/2024]
Abstract
Plastic pollution is widespread throughout aquatic environments globally, with many organisms known to interact with and ingest plastic. In marine environments, microbial biofilms that form on plastic surfaces can produce the odorous compound dimethyl sulfide (DMS), which is a known foraging cue. This has been shown to increase the ingestion of plastic by some invertebrates and therefore act as a biological factor which influences the risks of plastic to marine ecosystems. In freshwater however, the production of DMS has been largely overlooked, despite the known sensitivity of some freshwater species to this compound. To address this gap, the present study analyzed the production of DMS by biofilms which formed on low-density polyethylene and polylactic acid films after 3 and 6 weeks of submersion in either a rural or an urban United Kingdom river. Using gas chromatography-mass spectrometry, the production of DMS by these biofilms was consistently identified. The amount of DMS produced varied significantly across river locations and materials, with surfaces in the urban river generally producing a stronger signal and plastics producing up to seven times more DMS than glass control surfaces. Analysis of biofilm weight and photosynthetic pigment content indicated differences in biofilm composition across conditions and suggested that DMS production was largely driven by nonphotosynthetic taxa. For the first time this work has documented the production of DMS by plastic litter after submersion in freshwater rivers. Further work is now needed to determine if, as seen in marine systems, this production of DMS can encourage the interaction of freshwater organisms with plastic litter and therefore operate as a biological risk factor in the impacts of plastic on freshwater environments. Environ Toxicol Chem 2024;43:1485-1496. © 2024 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
Collapse
Affiliation(s)
- Katey Valentine
- Department of Environment and Geography, University of York, York, United Kingdom
- BeZero Carbon, London, United Kingdom
| | - Claire Hughes
- Department of Environment and Geography, University of York, York, United Kingdom
| | - Alistair Boxall
- Department of Environment and Geography, University of York, York, United Kingdom
| |
Collapse
|
4
|
Kelly ERM, Trujillo JE, Setiawan A, Pether S, Burritt D, Allan BJM. Investigating the metabolic and oxidative stress induced by biofouled microplastics exposure in Seriola lalandi (yellowtail kingfish). MARINE POLLUTION BULLETIN 2024; 203:116438. [PMID: 38749154 DOI: 10.1016/j.marpolbul.2024.116438] [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: 02/26/2024] [Revised: 04/14/2024] [Accepted: 04/28/2024] [Indexed: 06/06/2024]
Abstract
Microorganisms quickly colonise microplastics entering the ocean, forming a biofilm that, if ingested, is consumed with the microplastics. Past research often neglects to expose fish to biofouled microplastics, opting only for clean microplastics despite the low likelihood that fish will encounter clean microplastics. Here, we investigate the physiological impacts of biofouled polyethylene microplastic (300-335 μm) exposure in juvenile fish. Intermittent flow respirometry, antioxidant enzyme activity, and lipid peroxidation were investigated after fish were exposed to clean, biofouled, or no microplastic beads. Fish exposed to biofouled microplastics had a wider aerobic scope than those exposed to clean microplastics while antioxidant enzyme and lipid peroxidation levels were higher in clean microplastics. Clean microplastic exposure indicated higher fitness costs, potentially due to a nutritional advantage of the biofilm or varying bioavailability. These findings highlight the importance of replicating natural factors in exposure experiments when predicting the impacts of increasing pollutants in marine systems.
Collapse
Affiliation(s)
| | - José E Trujillo
- Department of Marine Science, University of Otago, New Zealand
| | | | | | - David Burritt
- Department of Botany, University of Otago, New Zealand
| | | |
Collapse
|
5
|
Kuhlisch C, Shemi A, Barak-Gavish N, Schatz D, Vardi A. Algal blooms in the ocean: hot spots for chemically mediated microbial interactions. Nat Rev Microbiol 2024; 22:138-154. [PMID: 37833328 DOI: 10.1038/s41579-023-00975-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2023] [Indexed: 10/15/2023]
Abstract
The cycling of major nutrients in the ocean is affected by large-scale phytoplankton blooms, which are hot spots of microbial life. Diverse microbial interactions regulate bloom dynamics. At the single-cell level, interactions between microorganisms are mediated by small molecules in the chemical crosstalk that determines the type of interaction, ranging from mutualism to pathogenicity. Algae interact with viruses, bacteria, parasites, grazers and other algae to modulate algal cell fate, and these interactions are dependent on the environmental context. Recent advances in mass spectrometry and single-cell technologies have led to the discovery of a growing number of infochemicals - metabolites that convey information - revealing the ability of algal cells to govern biotic interactions in the ocean. The diversity of infochemicals seems to account for the specificity in cellular response during microbial communication. Given the immense impact of algal blooms on biogeochemical cycles and climate regulation, a major challenge is to elucidate how microscale interactions control the fate of carbon and the recycling of major elements in the ocean. In this Review, we discuss microbial interactions and the role of infochemicals in algal blooms. We further explore factors that can impact microbial interactions and the available tools to decipher them in the natural environment.
Collapse
Affiliation(s)
- Constanze Kuhlisch
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Adva Shemi
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Noa Barak-Gavish
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
- Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Daniella Schatz
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Assaf Vardi
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel.
| |
Collapse
|
6
|
Güell-Bujons Q, Zanoli M, Tuval I, Calbet A, Simó R. Distinctive chemotactic responses of three marine herbivore protists to DMSP and related compounds. THE ISME JOURNAL 2024; 18:wrae130. [PMID: 38995932 PMCID: PMC11283757 DOI: 10.1093/ismejo/wrae130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 06/07/2024] [Accepted: 07/11/2024] [Indexed: 07/14/2024]
Abstract
Marine planktonic predator-prey interactions occur in microscale seascapes, where diffusing chemicals may act either as chemotactic cues that enhance or arrest predation, or as elemental resources that are complementary to prey ingestion. The phytoplankton osmolyte dimethylsulfoniopropionate (DMSP) and its degradation products dimethylsulfide (DMS) and acrylate are pervasive compounds with high chemotactic potential, but there is a longstanding controversy over whether they act as grazing enhancers or deterrents. Here, we investigated the chemotactic responses of three herbivorous dinoflagellates to point-sourced, microscale gradients of dissolved DMSP, DMS, and acrylate. We found no evidence for acrylate being a chemotactic repellent and observed a weak attractor role of DMS. DMSP behaved as a strong chemoattractor whose potential for grazing facilitation through effects on swimming patterns and aggregation depends on the grazer's feeding mode and ability to incorporate DMSP. Our study reveals that predation models will fail to predict grazing impacts unless they incorporate chemotaxis-driven searching and finding of prey.
Collapse
Affiliation(s)
- Queralt Güell-Bujons
- Institut de Ciències del Mar, ICM-CSIC, 08003 Barcelona, Catalonia, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Medea Zanoli
- Institut Mediterrani d’Estudis Avançats, IMEDEA (UIB-CSIC), 07190 Esporles, Mallorca, Spain
| | - Idan Tuval
- Institut Mediterrani d’Estudis Avançats, IMEDEA (UIB-CSIC), 07190 Esporles, Mallorca, Spain
| | - Albert Calbet
- Institut de Ciències del Mar, ICM-CSIC, 08003 Barcelona, Catalonia, Spain
| | - Rafel Simó
- Institut de Ciències del Mar, ICM-CSIC, 08003 Barcelona, Catalonia, Spain
| |
Collapse
|
7
|
Yang W, Tan Q, Qian S, Huang Y, Xu EG, Long X, Li W. Natural infochemical DMSP stimulates the transfer of microplastics from freshwater zooplankton to fish: An olfactory trap. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 265:106735. [PMID: 37984150 DOI: 10.1016/j.aquatox.2023.106735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023]
Abstract
Natural infochemicals may largely affect the trophic transfer of microplastics (MPs) in ecosystems but such infochemical effect and mechanisms are poorly understood. Here, a daphnids-zebrafish freshwater microcosm was designed to elucidate whether and how an algae-derived infochemical, dimethylsulfoniopropionate (DMSP), affects the ingestion and transfer of MPs. Daphnids fast accumulated DMSP and MPs from water, and DMSP in daphnids was mainly enriched from the DMSP in water but not from MPs. DMSP did not change the MP ingestion by daphnids. A low concentration of DMSP (0.5 nM) increased predation of daphnids by zebrafish, while high concentrations of DMSP (50, 100 and 200 nM) did not increase predation rates. The concentration of DMSP in daphnids and the MP predation by zebrafish showed a unimodal relationship. The predation for MP by zebrafish in the 0.5 and 5 nM DMSP treatments was 1.89 and 1.56 times that of the control, respectively. The concentrations of DMSP in freshwater samples were lower than 50 nM. This suggests DMSP at environmentally relevant concentrations may promote the trophic transfer of MPs in freshwater ecosystems via olfactory traps.
Collapse
Affiliation(s)
- Wei Yang
- Department of Ecological Sciences and Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Qian Tan
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, China
| | - Shenhua Qian
- Department of Ecological Sciences and Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yuyue Huang
- Department of Biology, University of Southern Denmark, Odense, 5230, Denmark
| | - Elvis Genbo Xu
- Department of Biology, University of Southern Denmark, Odense, 5230, Denmark
| | - Xizi Long
- Hunan Province Key Laboratory of Typical Environ. Pollut. and Health Hazards, School of Public Health, Hengyang Medical School, University of South China, Hengyang, 421001, China
| | - Wei Li
- Department of Ecological Sciences and Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
| |
Collapse
|
8
|
Lee K, Kim JS, Park KT, Park MJ, Jang E, Gudmundsson K, Olafsdottir SR, Olafsson J, Yoon YJ, Lee BY, Kwon SY, Kam J. Observational evidence linking ocean sulfur compounds to atmospheric dimethyl sulfide during Icelandic Sea phytoplankton blooms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 879:163020. [PMID: 36965732 DOI: 10.1016/j.scitotenv.2023.163020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/28/2023] [Accepted: 03/19/2023] [Indexed: 05/17/2023]
Abstract
In two Icelandic Sea spring blooms (May 2018 and 2019) in the North Atlantic Ocean (62.9-68.0°N, 9.0-28.0°W), chlorophyll-a and dimethylsulfoniopropionate (DMSP) concentrations and DMSP lyase activity (the DMSP-to-dimethyl sulfide (DMS) conversion efficiency) were measured at 67 stations, and the hourly atmospheric DMS mixing ratios were concurrently measured only in May 2019 at Storhofdi on Heimaey Island, located south of Iceland (63.4°N, 20.3°W). The ocean parameters for biology (i.e., chlorophyll-a, DMSP, and DMSP lyase activity) were broadly associated in distribution; however, the statistical significance of the association differed among four ocean domains and also between 2018 and 2019. Specifically, the widespread dominance of Phaeocystis, coccolithophores, and dinoflagellates (all rich in DMSP and high in DMSP lyase activity) across the study area is a compelling indication that variations in DMSP-rich phytoplankton were likely a main cause of the variations in statistical significance. For all the ocean domains defined here, we found that the DMS production capacity (calculated using the exposures of air masses to ocean biology prior to their arrivals at Heimaey and the atmospheric DMS mixing ratios of those air masses at Heimaey) was surprisingly consistent with in situ ocean S data (i.e., DMSP and DMSP lyase activity). Our study shows that the proposed computational approach enabled the detection of changes in DMS production and emission in association with changes in ocean primary producers.
Collapse
Affiliation(s)
- Kitack Lee
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea; Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul 03722, Republic of Korea
| | - Jun-Seok Kim
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Ki-Tae Park
- Division of Atmospheric Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea; Department of Polar Sciences, University of Science and Technology, Incheon 21990, Republic of Korea.
| | - Min-Ji Park
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Eunho Jang
- Division of Atmospheric Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea; Department of Polar Sciences, University of Science and Technology, Incheon 21990, Republic of Korea
| | | | | | - Jon Olafsson
- Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland
| | - Young Jun Yoon
- Division of Atmospheric Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
| | - Bang-Yong Lee
- Division of Atmospheric Sciences, Korea Polar Research Institute, Incheon 21990, Republic of Korea
| | - Sae Yun Kwon
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - Jonghun Kam
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| |
Collapse
|
9
|
Kelly ERM, Trujillo JE, Setiawan A, Pether S, Burritt D, Allan BJM. Investigating the impacts of biofouled marine plastic debris on the olfactory behaviour of juvenile yellowtail kingfish (Seriola lalandi). MARINE POLLUTION BULLETIN 2023; 192:115079. [PMID: 37236095 DOI: 10.1016/j.marpolbul.2023.115079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/07/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023]
Abstract
Marine microplastics are rapidly colonised by a microbial community which form a biofilm unique from the surrounding seawater that often contains infochemical-producing species associated with food sources. Here, we investigated whether juvenile kingfish (Seriola lalandi) were more attracted to biofouled plastics compared to clean plastics. Plastics were exposed to unfiltered seawater for one month to cultivate a microbial community. An olfactory behavioural experiment showed little difference in their response to the biofilm compared to clean plastic and control treatment. Further, ingestion experiments demonstrated that S. lalandi ingested fewer biofouled microplastics compared to clean microplastics. However, this was likely due to the bioavailability of the biofouled microplastics. This study highlights that while juvenile kingfish will ingest microplastics, they are not more attracted to those with a naturally acquired biofilm.
Collapse
Affiliation(s)
| | - José E Trujillo
- Department of Marine Science, University of Otago, New Zealand
| | | | | | - David Burritt
- Department of Botany, University of Otago, New Zealand
| | | |
Collapse
|
10
|
Michaiel AM, Bernard A. Neurobiology and changing ecosystems: Toward understanding the impact of anthropogenic influences on neurons and circuits. Front Neural Circuits 2022; 16:995354. [PMID: 36569799 PMCID: PMC9769128 DOI: 10.3389/fncir.2022.995354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 11/16/2022] [Indexed: 12/02/2022] Open
Abstract
Rapid anthropogenic environmental changes, including those due to habitat contamination, degradation, and climate change, have far-reaching effects on biological systems that may outpace animals' adaptive responses. Neurobiological systems mediate interactions between animals and their environments and evolved over millions of years to detect and respond to change. To gain an understanding of the adaptive capacity of nervous systems given an unprecedented pace of environmental change, mechanisms of physiology and behavior at the cellular and biophysical level must be examined. While behavioral changes resulting from anthropogenic activity are becoming increasingly described, identification and examination of the cellular, molecular, and circuit-level processes underlying those changes are profoundly underexplored. Hence, the field of neuroscience lacks predictive frameworks to describe which neurobiological systems may be resilient or vulnerable to rapidly changing ecosystems, or what modes of adaptation are represented in our natural world. In this review, we highlight examples of animal behavior modification and corresponding nervous system adaptation in response to rapid environmental change. The underlying cellular, molecular, and circuit-level component processes underlying these behaviors are not known and emphasize the unmet need for rigorous scientific enquiry into the neurobiology of changing ecosystems.
Collapse
|
11
|
Deng X, Ruan L, Ren R, Tao M, Zhang J, Wang L, Yan Y, Wen X, Yang X, Xie P. Phosphorus accelerate the sulfur cycle by promoting the release of malodorous volatile organic sulfur compounds from Microcystis in freshwater lakes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 845:157280. [PMID: 35835193 DOI: 10.1016/j.scitotenv.2022.157280] [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: 05/02/2022] [Revised: 06/18/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Volatile organic sulfur compounds (VSCs) released by algae are of great significance in sulfur cycle, climate regulation and biological information transmission, and they also caused taste and odor in freshwaters. However, the categories, sources, and environmental regulatory factors of VSCs in freshwaters were less known. Here, we show that eight common freshwater cyanobacterium Microcystis, which bloom in freshwaters over the world, are found to be important producers of VSCs. Dimethyl sulfide (DMS), dimethyl disulfide (DMDS) and isopropyl methyl sulfide (IPMS) are the main VSCs with the highest concentrations 184.81 nmol/L, 162.01 nmol/L and 101.55 nmol/L, respectively. The amount of VSCs released from those Microcystis varied greatly, M. elabens, M. panniformis and M. flos-aquae released the largest amount of VSCs (1260.52 nmol S/L, 1154.75 nmol S/L and 670.58 nmol S/L), and M. wesenbergii had the smallest release amount. We also found for the first time that phosphorus (P) was one of the important factors for the regulation VSCs from most Microcystis. P can elevate the release of DMS by promoting the biomass and DMS yields of most Microcystis in the range 0.05 mg/L to 0.5 mg/L. Similar results were also found in 16 lakes at three different spatiotemporal scales. Overall, we revealed that the common freshwater Microcystis were able to release diverse thioethers, and the major VSCs were significantly influenced by water P concentrations. In the context of global freshwater eutrophication and Microcystis bloom, freshwater cyanobacteria driven sulfur cycle and water odor will probably be further strengthened.
Collapse
Affiliation(s)
- Xuwei Deng
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China
| | - Linwei Ruan
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China
| | - Ren Ren
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China
| | - Min Tao
- School of Life Sciences, Neijiang Normal University, Neijiang 641112, China
| | - Jing Zhang
- Yangtze River Basin Ecological Environment Monitoring and Scientific Research Center, Yangtze River Basin Ecological Environment Supervision and Administration Bureau, Ministry of Ecology and Environment of the People's Republic of China, Wuhan 430010, China
| | - Lantian Wang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 10049, China
| | - Yunzhi Yan
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China
| | - Xinli Wen
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China
| | - Xi Yang
- State Key Laboratory of Plateau Ecology and Agriculture, College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China
| | - Ping Xie
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China; University of Chinese Academy of Sciences, Beijing 10049, China.
| |
Collapse
|
12
|
Little CJ, Rizzuto M, Luhring TM, Monk JD, Nowicki RJ, Paseka RE, Stegen JC, Symons CC, Taub FB, Yen JDL. Movement with meaning: integrating information into meta‐ecology. OIKOS 2022. [DOI: 10.1111/oik.08892] [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)
- Chelsea J. Little
- Biodiversity Research Centre, Univ. of British Columbia Vancouver BC Canada
- School of Environmental Science, Simon Fraser Univ. Burnaby BC Canada
| | - Matteo Rizzuto
- Dept of Biology, Memorial Univ. of Newfoundland St. John's NL Canada
| | | | - Julia D. Monk
- School of the Environment, Yale Univ. New Haven CT USA
| | - Robert J. Nowicki
- Elizabeth Moore International Center for Coral Reef Research and Restoration, Mote Marine Laboratory Summerland Key FL USA
| | - Rachel E. Paseka
- Dept of Ecology, Evolution and Behavior, Univ. of Minnesota Saint Paul MN USA
| | | | - Celia C. Symons
- Dept of Ecology and Evolutionary Biology, Univ. of California Irvine CA USA
| | - Frieda B. Taub
- School of Aquatic and Fishery Sciences, Univ. of Washington Seattle WA USA
| | - Jian D. L. Yen
- School of BioSciences, Univ. of Melbourne, Melbourne, Australia, and Arthur Rylah Inst. for Environmental Reserach Heidelberg Victoria Australia
| |
Collapse
|
13
|
Shemi A, Alcolombri U, Schatz D, Farstey V, Vincent F, Rotkopf R, Ben-Dor S, Frada MJ, Tawfik DS, Vardi A. Dimethyl sulfide mediates microbial predator-prey interactions between zooplankton and algae in the ocean. Nat Microbiol 2021; 6:1357-1366. [PMID: 34697459 DOI: 10.1038/s41564-021-00971-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 09/01/2021] [Indexed: 12/11/2022]
Abstract
Phytoplankton are key components of the oceanic carbon and sulfur cycles1. During bloom events, some species can emit large amounts of the organosulfur volatile dimethyl sulfide (DMS) into the ocean and consequently the atmosphere, where it can modulate aerosol formation and affect climate2,3. In aquatic environments, DMS plays an important role as a chemical signal mediating diverse trophic interactions. Yet, its role in microbial predator-prey interactions remains elusive with contradicting evidence for its role in either algal chemical defence or in the chemo-attraction of grazers to prey cells4,5. Here we investigated the signalling role of DMS during zooplankton-algae interactions by genetic and biochemical manipulation of the algal DMS-generating enzyme dimethylsulfoniopropionate lyase (DL) in the bloom-forming alga Emiliania huxleyi6. We inhibited DL activity in E. huxleyi cells in vivo using the selective DL-inhibitor 2-bromo-3-(dimethylsulfonio)-propionate7 and overexpressed the DL-encoding gene in the model diatom Thalassiosira pseudonana. We showed that algal DL activity did not serve as an anti-grazing chemical defence but paradoxically enhanced predation by the grazer Oxyrrhis marina and other microzooplankton and mesozooplankton, including ciliates and copepods. Consumption of algal prey with induced DL activity also promoted O. marina growth. Overall, our results demonstrate that DMS-mediated grazing may be ecologically important and prevalent during prey-predator dynamics in aquatic ecosystems. The role of algal DMS revealed here, acting as an eat-me signal for grazers, raises fundamental questions regarding the retention of its biosynthetic enzyme through the evolution of dominant bloom-forming phytoplankton in the ocean.
Collapse
Affiliation(s)
- Adva Shemi
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Uria Alcolombri
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel.,Institute of Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Zurich, Switzerland
| | - Daniella Schatz
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Viviana Farstey
- The Inter-University Institute for Marine Sciences, Eilat, Israel
| | - Flora Vincent
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Ron Rotkopf
- Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Shifra Ben-Dor
- Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Miguel J Frada
- The Inter-University Institute for Marine Sciences, Eilat, Israel.,Department of Ecology, Evolution and Behavior, Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Dan S Tawfik
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Assaf Vardi
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel.
| |
Collapse
|
14
|
Mao SH, Zhuang GC, Liu XW, Jin N, Zhang HH, Montgomery A, Liu XT, Yang GP. Seasonality of dimethylated sulfur compounds cycling in north China marginal seas. MARINE POLLUTION BULLETIN 2021; 170:112635. [PMID: 34218036 DOI: 10.1016/j.marpolbul.2021.112635] [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: 03/27/2021] [Revised: 06/09/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
Dimethylated sulfur compounds play an important role in global sulfur cycle. We investigated the seasonality of dimethylsulfoniopropionate (DMSP), dimethylsulfoxide (DMSO), dimethylsulfide (DMS) and associated processes in two north China marginal seas during 2014 and 2016. High concentrations of DMS, DMSP and DMSO occurred in summer/spring, while the lowest were observed in winter. This clear seasonality was primarily driven by biomass abundance and phytoplankton communities, reflected in chlorophyll a concentrations and the composition/ratios of diatoms and dinoflagellates. The spring maximum was attributed to the annual occurrence of algal bloom. The sea-to-air fluxes of DMS also varied largely between seasons, with an average of 8.84, 11.87, 10.50 and 2.14 μmol m-2 day-1 in spring, summer, autumn and winter, respectively. Given the seasonal uncertainty of sea-to-air flux, the seasonality or situations where specific blooms occur regularly should be considered for accurate estimation of annual global DMS emission.
Collapse
Affiliation(s)
- Shi-Hai Mao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China
| | - Guang-Chao Zhuang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China.
| | - Xin-Wei Liu
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Na Jin
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Hong-Hai Zhang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Andrew Montgomery
- Department of Marine Sciences, University of Georgia, Athens, GA 30602, USA
| | - Xi-Ting Liu
- Key Laboratory of Submarine Geosciences and Prospecting Technology, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
| | - Gui-Peng Yang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| |
Collapse
|
15
|
Liang Z, Liu Y, Xu Y, Wagner T. Bayesian change point quantile regression approach to enhance the understanding of shifting phytoplankton-dimethyl sulfide relationships in aquatic ecosystems. WATER RESEARCH 2021; 201:117287. [PMID: 34107366 DOI: 10.1016/j.watres.2021.117287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 05/14/2021] [Accepted: 05/20/2021] [Indexed: 06/12/2023]
Abstract
Dimethyl sulfide (DMS) serves as an anti-greenhouse gas, plays multiple roles in aquatic ecosystems, and contributes to the global sulfur cycle. The chlorophyll a (CHL, an indicator of phytoplankton biomass)-DMS relationship is critical for estimating DMS emissions from aquatic ecosystems. Importantly, recent research has identified that the CHL-DMS relationship has a breakpoint, where the relationship is positive below a CHL threshold and negative at higher CHL concentrations. Conventionally, mean regression methods are employed to characterize the CHL-DMS relationship. However, these approaches focus on the response of mean conditions and cannot illustrate responses of other parts of the DMS distribution, which could be important in order to obtain a complete view of the CHL-DMS relationship. In this study, for the first time, we proposed a novel Bayesian change point quantile regression (BCPQR) model that integrates and inherits advantages of Bayesian change point models and Bayesian quantile regression models. Our objective was to examine whether or not the BCPQR approach could enhance the understanding of shifting CHL-DMS relationships in aquatic ecosystems. We fitted BCPQR models at five regression quantiles for freshwater lakes and for seas. We found that BCPQR models could provide a relatively complete view on the CHL-DMS relationship. In particular, it quantified the upper boundary of the relationship, representing the limiting effect of CHL on DMS. Based on the results of paired parameter comparisons, we revealed the inequality of regression slopes in BCPQR models for seas, indicating that applying the mean regression method to develop the CHL-DMS relationship in seas might not be appropriate. We also confirmed relationship differences between lakes and seas at multiple regression quantiles. Further, by introducing the concept of DMS emission potential, we found that pH was not likely a key factor leading to the change of the CHL-DMS relationship in lakes. These findings cannot be revealed using piecewise linear regression. We thereby concluded that the BCPQR model does indeed enhance the understanding of shifting CHL-DMS relationships in aquatic ecosystems and is expected to benefit efforts aimed at estimating DMS emissions. Considering that shifting (threshold) relationships are not rare and that the BCPQR model can easily be adapted to different systems, the BCPQR approach is expected to have great potential for generalization in other environmental and ecological studies.
Collapse
Affiliation(s)
- Zhongyao Liang
- Key Laboratory of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China; Pennsylvania Cooperative Fish and Wildlife Research Unit, 407 Forest Resources Building, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
| | - Yong Liu
- College of Environmental Sciences and Engineering, State Environmental Protection Key Laboratory of All Materials Flux in Rivers, Peking University, Beijing 100871, China.
| | - Yaoyang Xu
- Key Laboratory of Urban Environment and Health, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China.
| | - Tyler Wagner
- U.S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, 402 Forest Resources Building, University Park, Pennsylvania 16802, USA.
| |
Collapse
|
16
|
Owen K, Saeki K, Warren JD, Bocconcelli A, Wiley DN, Ohira SI, Bombosch A, Toda K, Zitterbart DP. Natural dimethyl sulfide gradients would lead marine predators to higher prey biomass. Commun Biol 2021; 4:149. [PMID: 33526835 PMCID: PMC7851116 DOI: 10.1038/s42003-021-01668-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 01/05/2021] [Indexed: 11/15/2022] Open
Abstract
Finding prey is essential to survival, with marine predators hypothesised to track chemicals such as dimethyl sulfide (DMS) while foraging. Many predators are attracted to artificially released DMS, and laboratory experiments have shown that zooplankton grazing on phytoplankton accelerates DMS release. However, whether natural DMS concentrations are useful for predators and correlated to areas of high prey biomass remains a fundamental knowledge gap. Here, we used concurrent hydroacoustic surveys and in situ DMS measurements to present evidence that zooplankton biomass is spatially correlated to natural DMS concentration in air and seawater. Using agent simulations, we also show that following gradients of DMS would lead zooplankton predators to areas of higher prey biomass than swimming randomly. Further understanding of the conditions and scales over which these gradients occur, and how they are used by predators, is essential to predicting the impact of future changes in the ocean on predator foraging success. Kylie Owen et al. sample concurrent prey biomass and natural dimethyl sulfide (DMS) concentration, and show that these variables are correlated in air and seawater. Agent simulations show that following fine-scale gradients of DMS would lead zooplankton predators to higher prey biomass, shedding light on how marine predators may use these cues for foraging.
Collapse
Affiliation(s)
- Kylie Owen
- Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA.,Institute for Marine and Antarctic Studies, Ecology & Biodiversity Centre, University of Tasmania, Battery Point, TAS, Australia.,Department of Environmental Research and Monitoring, Swedish Museum of Natural History, Stockholm, Sweden
| | - Kentaro Saeki
- Department of Chemistry, Kumamoto University, Kumamoto, Japan
| | - Joseph D Warren
- School of Marine and Atmospheric Sciences, Stony Brook University, Southampton, NY, USA
| | - Alessandro Bocconcelli
- Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
| | - David N Wiley
- Stellwagen Bank National Marine Sanctuary, NOAA National Ocean Service, Scituate, MA, USA
| | - Shin-Ichi Ohira
- Department of Chemistry, Kumamoto University, Kumamoto, Japan
| | - Annette Bombosch
- Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
| | - Kei Toda
- Department of Chemistry, Kumamoto University, Kumamoto, Japan.
| | - Daniel P Zitterbart
- Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA. .,Biophysics Lab, Friedrich-Alexander-Universtät Erlangen-Nürnberg, Erlangen, Germany. .,International Research Organization for Advanced Science and Technology (IROAST), Kumamoto University, Kumamoto, Japan.
| |
Collapse
|
17
|
Wright RJ, Erni-Cassola G, Zadjelovic V, Latva M, Christie-Oleza JA. Marine Plastic Debris: A New Surface for Microbial Colonization. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:11657-11672. [PMID: 32886491 DOI: 10.1021/acs.est.0c02305] [Citation(s) in RCA: 215] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Plastics become rapidly colonized by microbes when released into marine environments. This microbial community-the Plastisphere-has recently sparked a multitude of scientific inquiries and generated a breadth of knowledge, which we bring together in this review. Besides providing a better understanding of community composition and biofilm development in marine ecosystems, we critically discuss current research on plastic biodegradation and the identification of potentially pathogenic "hitchhikers" in the Plastisphere. The Plastisphere is at the interface between the plastic and its surrounding milieu, and thus drives every interaction that this synthetic material has with its environment, from ecotoxicity and new links in marine food webs to the fate of the plastics in the water column. We conclude that research so far has not shown Plastisphere communities to starkly differ from microbial communities on other inert surfaces, which is particularly true for mature biofilm assemblages. Furthermore, despite progress that has been made in this field, we recognize that it is time to take research on plastic-Plastisphere-environment interactions a step further by identifying present gaps in our knowledge and offering our perspective on key aspects to be addressed by future studies: (I) better physical characterization of marine biofilms, (II) inclusion of relevant controls, (III) study of different successional stages, (IV) use of environmentally relevant concentrations of biofouled microplastics, and (V) prioritization of gaining a mechanistic and functional understanding of Plastisphere communities.
Collapse
Affiliation(s)
- Robyn J Wright
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Gabriel Erni-Cassola
- Man-Society-Environment (MSE) program, University of Basel, Basel 4003, Switzerland
| | - Vinko Zadjelovic
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
| | - Mira Latva
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Joseph A Christie-Oleza
- University of the Balearic Islands, Palma 07122, Spain
- IMEDEA (CSIC-UIB), Esporles 07190, Spain
| |
Collapse
|
18
|
Marleau JN, Peller T, Guichard F, Gonzalez A. Converting Ecological Currencies: Energy, Material, and Information Flows. Trends Ecol Evol 2020; 35:1068-1077. [PMID: 32919798 DOI: 10.1016/j.tree.2020.07.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 07/18/2020] [Accepted: 07/24/2020] [Indexed: 12/20/2022]
Abstract
Understanding how the three currencies of life - energy, material, and information - interact is a key step towards synthesis in ecology and evolution. However, current theory focuses on the role of matter as a resource and energy, and typically ignores how the same matter can have other important effects as a carrier of information or modifier of the environment. Here we present the hypothesis that the dynamic conversion of matter by organisms among its three currencies mediates the structure and function of ecosystems, and that these effects can even supersede the effects of matter as a resource. Humans are changing the information in the environment and this is altering species interactions and flows of matter within and among ecosystems.
Collapse
Affiliation(s)
- Justin N Marleau
- Department of Biology, McGill University, Montreal, Quebec, Canada.
| | - Tianna Peller
- Department of Biology, McGill University, Montreal, Quebec, Canada
| | | | - Andrew Gonzalez
- Department of Biology, McGill University, Montreal, Quebec, Canada
| |
Collapse
|
19
|
Müller C, Caspers BA, Gadau J, Kaiser S. The Power of Infochemicals in Mediating Individualized Niches. Trends Ecol Evol 2020; 35:981-989. [PMID: 32723498 DOI: 10.1016/j.tree.2020.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/26/2020] [Accepted: 07/02/2020] [Indexed: 12/24/2022]
Abstract
Infochemicals, including hormones, pheromones, and allelochemicals, play a central role in mediating information and shaping interactions within and between individuals. Due to their high plasticity, infochemicals are predestined mediators in facilitating individualized niches of organisms. Only recently it has become clear that individual differences are essential to understand how and why individuals realize a tiny subset of the species' niche. Moreover, individual differences have a central role in both ecological adjustment and evolutionary adaptation in a rapidly changing world. Here we highlight that infochemicals act as key signals or cues and empower the realization of the individualized niche through three proposed processes: niche choice, niche conformance, and niche construction.
Collapse
Affiliation(s)
- Caroline Müller
- Chemical Ecology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany.
| | - Barbara A Caspers
- Behavioral Ecology, Bielefeld University, Konsequenz 45, 33615 Bielefeld, Germany
| | - Jürgen Gadau
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstraße 1, 48149 Münster, Germany
| | - Sylvia Kaiser
- Department of Behavioural Biology, University of Münster, Badestr. 13, 48149 Münster, Germany
| |
Collapse
|
20
|
Baldovini N, Chaintreau A. Identification of key odorants in complex mixtures occurring in nature. Nat Prod Rep 2020; 37:1589-1626. [PMID: 32692323 DOI: 10.1039/d0np00020e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: up to 2019Soon after the birth of gas chromatography, mass spectrometry and olfactometry were used as detectors, which allowed impressive development to be achieved in the area of odorant determinations. Since the mid-80s, structured methods of gas chromatography-olfactometry have appeared, allowing the determination of which odor constituents play a key role in materials. Progressively, numerous strategies have been proposed for sample preparation from raw materials, the representativeness evaluation of extracts, the identification of odor constituents, their quantification, and subsequently, the recombination of the key odorants to mimic the initial odor. However, the multiplicity of options at each stage of the analysis leads to a confusing landscape in this field, and thus, the present review aims at critically presenting the available options. For each step, the most frequently used alternatives are described, together with their strengths and weaknesses based on theoretical and experimental justifications according to the literature. These techniques are exemplified by many applications in the literature on aromas, fragrances and essential oils, with the initial focus on wine odorants, followed by a short overview on the molecular diversity of key odorants, which illustrates most of the facets and complexities of odor studies, including the issues raised by odorant interactions such as synergies.
Collapse
Affiliation(s)
- Nicolas Baldovini
- Institut de Chimie de Nice, Faculté des Sciences, Université Côte d'Azur, 06108 Nice Cedex 2, France.
| | | |
Collapse
|
21
|
Deng X, Chen J, Hansson LA, Zhao X, Xie P. Eco-chemical mechanisms govern phytoplankton emissions of dimethylsulfide in global surface waters. Natl Sci Rev 2020; 8:nwaa140. [PMID: 34691568 PMCID: PMC8288430 DOI: 10.1093/nsr/nwaa140] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/27/2020] [Accepted: 06/19/2020] [Indexed: 12/02/2022] Open
Abstract
The anti-greenhouse gas dimethylsulfide (DMS) is mainly emitted by algae and accounts for more than half of the total natural flux of gaseous sulfur to the atmosphere, strongly reducing the solar radiation and thereby the temperature on Earth. However, the relationship between phytoplankton biomass and DMS emissions is debated and inconclusive. Our study presents field observations from 100 freshwater lakes, in concert with data of global ocean DMS emissions, showing that DMS and algal biomass show a hump-shaped relationship, i.e. DMS emissions to the atmosphere increase up to a pH of about 8.1 but, at higher pH, DMS concentrations decline, likely mainly due to decomposition. Our findings from lake and ocean ecosystems worldwide were corroborated in experimental studies. This novel finding allows assessments of more accurate global patterns of DMS emissions and advances our knowledge on the negative feedback regulation of phytoplankton-driven DMS emissions on climate.
Collapse
Affiliation(s)
- Xuwei Deng
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jun Chen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Lars-Anders Hansson
- Department of Biology/Aquatic Ecology, Lund University, S-223 62 Lund, Sweden
| | - Xia Zhao
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Ping Xie
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China
| |
Collapse
|
22
|
Zink L, Pyle GG. Contrary to Marine Environments, Common Microplastics in Freshwater Systems May Not Emit Dimethyl Sulfide: An Important Infochemical. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 103:766-769. [PMID: 31587083 DOI: 10.1007/s00128-019-02726-7] [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: 07/22/2019] [Accepted: 09/27/2019] [Indexed: 06/10/2023]
Abstract
The ingestion of microplastics by marine species has been at least partially attributed to plastics emitting a dimethyl sulfide signature when exposed to marine conditions. Dimethyl sulfide, a member of the volatile organic sulfur compounds group, is an infochemical that many species rely on to locate and identify prey while foraging. Microplastic ingestion is also observed in freshwater systems; however, this study shows that the same dimethyl sulfide signature is not obtained by three common types of plastic (high-density polyethylene, low-density polyethylene, and polystyrene) in freshwater systems, suggesting that there may be an alternate mechanism driving plastic ingestion by freshwater species.
Collapse
Affiliation(s)
- Lauren Zink
- Department of Biological Sciences, University of Lethbridge, 4401 University Drive West, Lethbridge, AB, T1K 3M4, Canada.
| | - Gregory G Pyle
- Department of Biological Sciences, University of Lethbridge, 4401 University Drive West, Lethbridge, AB, T1K 3M4, Canada
| |
Collapse
|
23
|
Information limitation and the dynamics of coupled ecological systems. Nat Ecol Evol 2019; 4:82-90. [PMID: 31659309 DOI: 10.1038/s41559-019-1008-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/16/2019] [Indexed: 01/09/2023]
Abstract
The dynamics of large ecological systems result from vast numbers of interactions between individual organisms. Here, we develop mathematical theory to show that the rate of such interactions is inherently limited by the ability of organisms to gain information about one another. This phenomenon, which we call 'information limitation', is likely to be widespread in real ecological systems and can dictate both the rates of ecological interactions and long-run dynamics of interacting populations. We show how information limitation leads to sigmoid interaction rate functions that can stabilize antagonistic interactions and destabilize mutualistic ones; as a species or type becomes rare, information on its whereabouts also becomes rare, weakening coupling with consumers, pathogens and mutualists. This can facilitate persistence of consumer-resource systems, alter the course of pathogen infections within a host and enhance the rates of oceanic productivity and carbon export. Our findings may shed light on phenomena in many living systems where information drives interactions.
Collapse
|
24
|
Okane D, Koveke EP, Tashima K, Saeki K, Maezono S, Nagahata T, Hayashi N, Owen K, Zitterbart DP, Ohira SI, Toda K. High Sensitivity Monitoring Device for Onboard Measurement of Dimethyl Sulfide and Dimethylsulfoniopropionate in Seawater and an Oceanic Atmosphere. Anal Chem 2019; 91:10484-10491. [PMID: 31337210 DOI: 10.1021/acs.analchem.9b01360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An automated device has been developed to measure aqueous dimethyl sulfide (DMSaq), its precursor dimethylsulfoniopropionate (DMSP), and atmospheric gaseous dimethyl sulfide (DMSg). In addition to having a role in the oceanic atmosphere, DMS and DMSP have recently gained substantial interest within the biosciences and are suspected as chemoattractants for predators searching for prey. To provide the spatial resolution relevant for biogeochemical functions, fast and on-site analysis of these compounds is an important technique. The system described measures the dimethyl sulfur compounds by sequential vaporization of DMSaq and DMSP to their gas phase, which is then analyzed by chemiluminescence detection (SVG-CL). The device has five analysis modes (full, DMS, water, gas, and DMSP mode) that can be selected by the user depending on the required analyte or desired sampling rate. Seawater analyses were performed by the developed SVG-CL system and, simultaneously, by an ion molecule reaction-mass spectrometer and a gas chromatograph-flame photometric detector to verify quantitative analysis results. Results obtained by the new method/device agreed well with those by the other methods. Detection limits of the SVG-CL system are 0.02 ppbv and 0.04 nM for DMSg and DMSaq/DMSP, respectively, which are much better than those of the mass spectrometer. The SVG-CL system can be easily installed and operated on a boat. Spatial variability in DMS and DMSP off the coast of Japan were obtained, showing significant changes in the concentrations of the components at the brackish/saline water interface and at the channel between the closed and open seas.
Collapse
Affiliation(s)
- Daiki Okane
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| | - Edwin P Koveke
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| | - Koya Tashima
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| | - Kentaro Saeki
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| | - Seiya Maezono
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| | - Takanori Nagahata
- Mitsubishi Chemical Analytech , 7-10-1 Chuo-Rinkan , Yamato , Kanagawa 242-0007 , Japan
| | - Norio Hayashi
- Mitsubishi Chemical Analytech , 7-10-1 Chuo-Rinkan , Yamato , Kanagawa 242-0007 , Japan
| | - Kylie Owen
- Applied Ocean Physics and Engineering , Woods Hole Oceanographic Institution , 266 Woods Hole Road , Woods Hole , Massachusetts 02543 , United States
| | - Daniel P Zitterbart
- Applied Ocean Physics and Engineering , Woods Hole Oceanographic Institution , 266 Woods Hole Road , Woods Hole , Massachusetts 02543 , United States
| | - Shin-Ichi Ohira
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| | - Kei Toda
- Department of Chemistry , Kumamoto University , 2-39-1 Kurokami , Kumamoto 860-8555 , Japan
| |
Collapse
|
25
|
Bouchard B, Barnagaud JY, Poupard M, Glotin H, Gauffier P, Torres Ortiz S, Lisney TJ, Campagna S, Rasmussen M, Célérier A. Behavioural responses of humpback whales to food-related chemical stimuli. PLoS One 2019; 14:e0212515. [PMID: 30807595 PMCID: PMC6391047 DOI: 10.1371/journal.pone.0212515] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/04/2019] [Indexed: 11/26/2022] Open
Abstract
Baleen whales face the challenge of finding patchily distributed food in the open ocean. Their relatively well-developed olfactory structures suggest that they could identify the specific odours given off by planktonic prey such as krill aggregations. Like other marine predators, they may also detect dimethyl sulfide (DMS), a chemical released in areas of high marine productivity. However, dedicated behavioural studies still have to be conducted in baleen whales in order to confirm the involvement of chemoreception in their feeding ecology. We implemented 56 behavioural response experiments in humpback whales using two food-related chemical stimuli, krill extract and DMS, as well as their respective controls (orange clay and vegetable oil) in their breeding (Madagascar) and feeding grounds (Iceland and Antarctic Peninsula). The whales approached the stimulus area and stayed longer in the trial zone during krill extract trials compared to control trials, suggesting that they were attracted to the chemical source and spent time exploring its surroundings, probably in search of prey. This response was observed in Iceland, and to a lesser extend in Madagascar, but not in Antarctica. Surface behaviours indicative of sensory exploration, such as diving under the stimulus area and stopping navigation, were also observed more often during krill extract trials than during control trials. Exposure to DMS did not elicit such exploration behaviours in any of the study areas. However, acoustic analyses suggest that DMS and krill extract both modified the whales' acoustic activity in Madagascar. Altogether, these results provide the first behavioural evidence that baleen whales actually perceive prey-derived chemical cues over distances of several hundred metres. Chemoreception, especially olfaction, could thus be used for locating prey aggregations and for navigation at sea, as it has been shown in other marine predators including seabirds.
Collapse
Affiliation(s)
- Bertrand Bouchard
- Behavioural Ecology Group, CEFE UMR 5175, CNRS–Université de Montpellier–Université Paul-Valéry Montpellier–EPHE, Montpellier, France
- Université de Montpellier, Montpellier, France
| | - Jean-Yves Barnagaud
- Behavioural Ecology Group, CEFE UMR 5175, CNRS–Université de Montpellier–Université Paul-Valéry Montpellier–EPHE, Montpellier, France
| | - Marion Poupard
- DYNI team, LIS, Université de Toulon, Université Aix-Marseille, CNRS, Marseille, France
| | - Hervé Glotin
- DYNI team, LIS, Université de Toulon, Université Aix-Marseille, CNRS, Marseille, France
| | - Pauline Gauffier
- CIRCE, Conservation, Information and Research on Cetaceans, Algeciras-Pelayo, Cadiz, Spain
| | - Sara Torres Ortiz
- Marine Biological Research Centre, Department of Biology, University of Southern Denmark, Kerteminde, Denmark
| | - Thomas J. Lisney
- Behavioural Ecology Group, CEFE UMR 5175, CNRS–Université de Montpellier–Université Paul-Valéry Montpellier–EPHE, Montpellier, France
- Université de Montpellier, Montpellier, France
| | | | | | - Aurélie Célérier
- Behavioural Ecology Group, CEFE UMR 5175, CNRS–Université de Montpellier–Université Paul-Valéry Montpellier–EPHE, Montpellier, France
- Université de Montpellier, Montpellier, France
| |
Collapse
|
26
|
|
27
|
Lavoie M, Galí M, Sévigny C, Kieber DJ, Sunda WG, Spiese CE, Maps F, Levasseur M. Modelling dimethylsulfide diffusion in the algal external boundary layer: implications for mutualistic and signalling roles. Environ Microbiol 2018; 20:4157-4169. [DOI: 10.1111/1462-2920.14417] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 08/26/2018] [Accepted: 09/07/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Michel Lavoie
- Québec‐Océan and Unité Mixte Internationale Takuvik Ulaval‐CNRS, Département de Biologie Université Laval Québec Québec G1V 0A6 Canada
| | - Martí Galí
- Québec‐Océan and Unité Mixte Internationale Takuvik Ulaval‐CNRS, Département de Biologie Université Laval Québec Québec G1V 0A6 Canada
| | - Caroline Sévigny
- Institut des sciences de la mer de Rimouski Université du Québec à Rimouski 310 allée des Ursulines, Québec G5L 3A1 Canada
| | - David J. Kieber
- Department of Chemistry State University of New York, College of Environmental Science and Forestry Syracuse, NY 13210 USA
| | - William G. Sunda
- Department of Marine Sciences University of North Carolina 292 Old Piedmont Circle, Chapel Hill NC 27516 USA
| | - Christopher E. Spiese
- Donald J. Bettinger Department of Chemistry and Biochemistry Ohio Northern University 525 South Main St, Ada OH 45810 USA
| | - Frédéric Maps
- Québec‐Océan and Unité Mixte Internationale Takuvik Ulaval‐CNRS, Département de Biologie Université Laval Québec Québec G1V 0A6 Canada
| | - Maurice Levasseur
- Québec‐Océan and Unité Mixte Internationale Takuvik Ulaval‐CNRS, Département de Biologie Université Laval Québec Québec G1V 0A6 Canada
| |
Collapse
|
28
|
Cropp R, Gabric A, van Tran D, Jones G, Swan H, Butler H. Coral reef aerosol emissions in response to irradiance stress in the Great Barrier Reef, Australia. AMBIO 2018; 47:671-681. [PMID: 29397545 PMCID: PMC6131131 DOI: 10.1007/s13280-018-1018-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 12/27/2017] [Accepted: 01/12/2018] [Indexed: 06/07/2023]
Abstract
We investigate the correlation between stress-related compounds produced by corals of the Great Barrier Reef (GBR) and local atmospheric properties-an issue that goes to the core of the coral ecosystem's ability to survive climate change. We relate the variability in a satellite decadal time series of fine-mode aerosol optical depth (AOD) to a coral stress metric, formulated as a function of irradiance, water clarity, and tide, at Heron Island in the southern GBR. We found that AOD was correlated with the coral stress metric, and the correlation increased at low wind speeds, when horizontal advection of air masses was low and the production of non-biogenic aerosols was minimal. We posit that coral reefs may be able to protect themselves from irradiance stress during calm weather by affecting the optical properties of the atmosphere and local incident solar radiation.
Collapse
Affiliation(s)
- Roger Cropp
- Griffith School of Environment, Griffith University, Nathan, QLD 4111 Australia
| | - Albert Gabric
- Griffith School of Environment, Griffith University, Nathan, QLD 4111 Australia
| | - Dien van Tran
- Griffith School of Environment, Griffith University, Nathan, QLD 4111 Australia
| | - Graham Jones
- Southern Cross University, Lismore, NSW 2480 Australia
| | - Hilton Swan
- Southern Cross University, Lismore, NSW 2480 Australia
| | - Harry Butler
- School of Agricultural, Computational and Environmental Sciences, University of Southern Queensland, Toowoomba, QLD 4350 Australia
| |
Collapse
|
29
|
Jackson R, Gabric A, Cropp R. Effects of ocean warming and coral bleaching on aerosol emissions in the Great Barrier Reef, Australia. Sci Rep 2018; 8:14048. [PMID: 30232386 PMCID: PMC6145874 DOI: 10.1038/s41598-018-32470-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/07/2018] [Indexed: 01/23/2023] Open
Abstract
It is proposed that emissions of volatile sulfur compounds by coral reefs contribute to the formation of a biologically-derived feedback on sea surface temperature (SST) through the formation of marine biogenic aerosol (MBA). The direction and strength of this feedback remains uncertain and constitutes a fundamental constraint on predicting the ability of corals to cope with future ocean warming. We investigate the effects of elevated SST and irradiance on satellite-derived fine-mode aerosol optical depth (AOD) throughout the Great Barrier Reef, Australia (GBR) over an 18-year time period. AOD is positively correlated with SST and irradiance and increases two-fold during spring and summer with high frequency variability. As the influence of non-biogenic and distant aerosol sources are found to be negligible, the results support recent findings that the 2,300 km stretch of coral reefs can be a substantial source of biogenic aerosol and thus, influence local ocean albedo. Importantly however, a tipping point in the coral stress response is identified, whereby thermal stress reaches a point that exceeds the capacity of corals to influence local atmospheric properties. Beyond this point, corals may become more susceptible to permanent damage with increasing stress, with potential implications for mass coral bleaching events.
Collapse
Affiliation(s)
- Rebecca Jackson
- School of Environment and Science, Griffith University, Gold Coast, 4222, Australia.
- Australian Rivers Institute, Griffith University, Gold Coast, 4222, Australia.
| | - Albert Gabric
- Australian Rivers Institute, Griffith University, Gold Coast, 4222, Australia
- School of Environment and Science, Griffith University, Nathan, 4111, Australia
| | - Roger Cropp
- School of Environment and Science, Griffith University, Gold Coast, 4222, Australia
| |
Collapse
|
30
|
Courbin N, Besnard A, Péron C, Saraux C, Fort J, Perret S, Tornos J, Grémillet D. Short-term prey field lability constrains individual specialisation in resource selection and foraging site fidelity in a marine predator. Ecol Lett 2018; 21:1043-1054. [PMID: 29659122 DOI: 10.1111/ele.12970] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/11/2018] [Accepted: 03/26/2018] [Indexed: 01/21/2023]
Abstract
Spatio-temporally stable prey distributions coupled with individual foraging site fidelity are predicted to favour individual resource specialisation. Conversely, predators coping with dynamic prey distributions should diversify their individual diet and/or shift foraging areas to increase net intake. We studied individual specialisation in Scopoli's shearwaters (Calonectris diomedea) from the highly dynamic Western Mediterranean, using daily prey distributions together with resource selection, site fidelity and trophic-level analyses. As hypothesised, we found dietary diversification, low foraging site fidelity and almost no individual specialisation in resource selection. Crucially, shearwaters switched daily foraging tactics, selecting areas with contrasting prey of varying trophic levels. Overall, information use and plastic resource selection of individuals with reduced short-term foraging site fidelity allow predators to overcome prey field lability. Our study is an essential step towards a better understanding of individual responses to enhanced environmental stochasticity driven by global changes, and of pathways favouring population persistence.
Collapse
Affiliation(s)
- Nicolas Courbin
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, Université Paul Valéry Montpellier, Ecole Pratiques des Hautes Etudes (EPHE), 1919 Route de Mende, 34293, Montpellier Cedex 5, France
| | - Aurélien Besnard
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, Université Paul Valéry Montpellier, Ecole Pratiques des Hautes Etudes (EPHE), 1919 Route de Mende, 34293, Montpellier Cedex 5, France
| | - Clara Péron
- Marine Biodiversity Exploitation and Conservation (MARBEC), UMR 248, Institut de Recherche pour le Développement (IRD), Université de Montpellier, Place Eugène Bataillon - bât 24 - CC093, 34095, Montpellier Cedex 5, France
| | - Claire Saraux
- Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), UMR 248 MARBEC, Avenue Jean Monnet CS 3017, 34203, Sète, France
| | - Jérôme Fort
- Littoral, Environnement et Sociétés (LIENSs), UMR 7266, Centre National de la Recherche Scientifique (CNRS), Université La Rochelle, 2 rue Olympe de Gouges, 17000, La Rochelle, France
| | - Samuel Perret
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, Université Paul Valéry Montpellier, Ecole Pratiques des Hautes Etudes (EPHE), 1919 Route de Mende, 34293, Montpellier Cedex 5, France
| | - Jérémy Tornos
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, Université Paul Valéry Montpellier, Ecole Pratiques des Hautes Etudes (EPHE), 1919 Route de Mende, 34293, Montpellier Cedex 5, France
| | - David Grémillet
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, Centre National de la Recherche Scientifique (CNRS), Université de Montpellier, Université Paul Valéry Montpellier, Ecole Pratiques des Hautes Etudes (EPHE), 1919 Route de Mende, 34293, Montpellier Cedex 5, France
- FitzPatrick Institute, DST/NRF Excellence Centre at the University of Cape Town, Rondebosch, 7701, South Africa
| |
Collapse
|
31
|
Flux of the biogenic volatiles isoprene and dimethyl sulfide from an oligotrophic lake. Sci Rep 2018; 8:630. [PMID: 29330538 PMCID: PMC5766545 DOI: 10.1038/s41598-017-18923-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 12/06/2017] [Indexed: 01/08/2023] Open
Abstract
Biogenic volatile organic compounds (BVOCs) affect atmospheric chemistry, climate and regional air quality in terrestrial and marine atmospheres. Although isoprene is a major BVOC produced in vascular plants, and marine phototrophs release dimethyl sulfide (DMS), lakes have been widely ignored for their production. Here we demonstrate that oligotrophic Lake Constance, a model for north temperate deep lakes, emits both volatiles to the atmosphere. Depth profiles indicated that highest concentrations of isoprene and DMS were associated with the chlorophyll maximum, suggesting that their production is closely linked to phototrophic processes. Significant correlations of the concentration patterns with taxon-specific fluorescence data, and measurements from algal cultures confirmed the phototrophic production of isoprene and DMS. Diurnal fluctuations in lake isoprene suggested an unrecognised physiological role in environmental acclimation similar to the antioxidant function of isoprene that has been suggested for marine biota. Flux estimations demonstrated that lakes are a currently undocumented source of DMS and isoprene to the atmosphere. Lakes may be of increasing importance for their contribution of isoprene and DMS to the atmosphere in the arctic zone where lake area coverage is high but terrestrial sources of BVOCs are small.
Collapse
|
32
|
The neurobiology of climate change. Naturwissenschaften 2018; 105:11. [DOI: 10.1007/s00114-017-1538-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 12/06/2017] [Accepted: 12/23/2017] [Indexed: 12/24/2022]
|
33
|
Steinke M, Randell L, Dumbrell AJ, Saha M. Volatile Biomarkers for Aquatic Ecological Research. ADV ECOL RES 2018. [DOI: 10.1016/bs.aecr.2018.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
34
|
Savoca MS, Tyson CW, McGill M, Slager CJ. Odours from marine plastic debris induce food search behaviours in a forage fish. Proc Biol Sci 2017; 284:rspb.2017.1000. [PMID: 28814656 DOI: 10.1098/rspb.2017.1000] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/12/2017] [Indexed: 12/31/2022] Open
Abstract
Plastic pollution is an anthropogenic stressor in marine ecosystems globally. Many species of marine fish (more than 50) ingest plastic debris. Ingested plastic has a variety of lethal and sublethal impacts and can be a route for bioaccumulation of toxic compounds throughout the food web. Despite its pervasiveness and severity, our mechanistic understanding of this maladaptive foraging behaviour is incomplete. Recent evidence suggests that the chemical signature of plastic debris may explain why certain species are predisposed to mistaking plastic for food. Anchovy (Engraulis sp.) are abundant forage fish in coastal upwelling systems and a critical prey resource for top predators. Anchovy ingest plastic in natural conditions, though the mechanism they use to misidentify plastic as prey is unknown. Here, we presented wild-caught schools of northern anchovy (Engraulis mordax) with odour solutions made of plastic debris and clean plastic to compare school-wide aggregation and rheotactic responses relative to food and food odour presentations. Anchovy schools responded to plastic debris odour with increased aggregation and reduced rheotaxis. These results were similar to the effects food and food odour presentations had on schools. Conversely, these behavioural responses were absent in clean plastic and control treatments. To our knowledge, this is the first experimental evidence that adult anchovy use odours to forage. We conclude that the chemical signature plastic debris acquires in the photic zone can induce foraging behaviours in anchovy schools. These findings provide further support for a chemosensory mechanism underlying plastic consumption by marine wildlife. Given the trophic position of forage fish, these findings have considerable implications for aquatic food webs and possibly human health.
Collapse
Affiliation(s)
- Matthew S Savoca
- Graduate Group in Ecology, University of California, Davis, CA 95616, USA
| | - Chris W Tyson
- Graduate Group in Ecology, University of California, Davis, CA 95616, USA
| | - Michael McGill
- Aquarium of the Bay, Pier 39, Embarcadero at Beach Street, San Francisco, CA 94133, USA
| | - Christina J Slager
- Aquarium of the Bay, Pier 39, Embarcadero at Beach Street, San Francisco, CA 94133, USA
| |
Collapse
|
35
|
Abstract
In this Quick Guide, Votier and Sherley explain how diverse seabirds play important roles in ecosystem functioning, global nutrient cycling and climate regulation, but are declining in the face of multiple threats.
Collapse
Affiliation(s)
- Stephen C Votier
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, TR10 9FE, UK.
| | - Richard B Sherley
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, TR10 9FE, UK
| |
Collapse
|
36
|
Veit RR, Harrison NM. Positive Interactions among Foraging Seabirds, Marine Mammals and Fishes and Implications for Their Conservation. Front Ecol Evol 2017. [DOI: 10.3389/fevo.2017.00121] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
37
|
Foretich MA, Paris CB, Grosell M, Stieglitz JD, Benetti DD. Dimethyl Sulfide is a Chemical Attractant for Reef Fish Larvae. Sci Rep 2017; 7:2498. [PMID: 28566681 PMCID: PMC5451384 DOI: 10.1038/s41598-017-02675-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 04/18/2017] [Indexed: 11/29/2022] Open
Abstract
Transport of coral reef fish larvae is driven by advection in ocean currents and larval swimming. However, for swimming to be advantageous, larvae must use external stimuli as guides. One potential stimulus is "odor" emanating from settlement sites (e.g., coral reefs), signaling the upstream location of desirable settlement habitat. However, specific chemicals used by fish larvae have not been identified. Dimethyl sulfide (DMS) is produced in large quantities at coral reefs and may be important in larval orientation. In this study, a choice-chamber (shuttle box) was used to assess preference of 28 pre-settlement stage larvae from reef fish species for seawater with DMS. Swimming behavior was examined by video-tracking of larval swimming patterns in control and DMS seawater. We found common responses to DMS across reef fish taxa - a preference for water with DMS and change in swimming behavior - reflecting a switch to "exploratory behavior". An open water species displayed no response to DMS. Affinity for and swimming response to DMS would allow a fish larva to locate its source and enhance its ability to find settlement habitat. Moreover, it may help them locate prey accumulating in fronts, eddies, and thin layers, where DMS is also produced.
Collapse
Affiliation(s)
- Matthew A Foretich
- Department of Ocean Sciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, 33149, USA.
| | - Claire B Paris
- Department of Ocean Sciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, 33149, USA
| | - Martin Grosell
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, 33149, USA
| | - John D Stieglitz
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, 33149, USA
| | - Daniel D Benetti
- Department of Marine Ecosystems and Society, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, 33149, USA
| |
Collapse
|
38
|
Block E, Batista VS, Matsunami H, Zhuang H, Ahmed L. The role of metals in mammalian olfaction of low molecular weight organosulfur compounds. Nat Prod Rep 2017; 34:529-557. [PMID: 28471462 PMCID: PMC5542778 DOI: 10.1039/c7np00016b] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Covering: up to the end of 2017While suggestions concerning the possible role of metals in olfaction and taste date back 50 years, only recently has it been possible to confirm these proposals with experiments involving individual olfactory receptors (ORs). A detailed discussion of recent experimental results demonstrating the key role of metals in enhancing the response of human and other vertebrate ORs to specific odorants is presented against the backdrop of our knowledge of how the sense of smell functions both at the molecular and whole animal levels. This review emphasizes the role of metals in the detection of low molecular weight thiols, sulfides, and other organosulfur compounds, including those found in strong-smelling animal excretions and plant volatiles, and those used in gas odorization. Alternative theories of olfaction are described, with evidence favoring the modified "shape" theory. The use of quantum mechanical/molecular modeling (QM/MM), site-directed mutagenesis and saturation-transfer-difference (STD) NMR is discussed, providing support for biological studies of mouse and human receptors, MOR244-3 and OR OR2T11, respectively. Copper is bound at the active site of MOR244-3 by cysteine and histidine, while cysteine, histidine and methionine are involved with OR2T11. The binding pockets of these two receptors are found in different locations in the three-dimensional seven transmembrane models. Another recently deorphaned human olfactory receptor, OR2M3, highly selective for a thiol from onions, and a broadly-tuned thiol receptor, OR1A1, are also discussed. Other topics covered include the effects of nanoparticles and heavy metal toxicants on vertebrate and fish ORs, intranasal zinc products and the loss of smell (anosmia).
Collapse
Affiliation(s)
- Eric Block
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, USA.
| | | | | | | | | |
Collapse
|
39
|
Sherley RB, Ludynia K, Dyer BM, Lamont T, Makhado AB, Roux JP, Scales KL, Underhill LG, Votier SC. Metapopulation Tracking Juvenile Penguins Reveals an Ecosystem-wide Ecological Trap. Curr Biol 2017; 27:563-568. [PMID: 28190725 DOI: 10.1016/j.cub.2016.12.054] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 11/17/2016] [Accepted: 12/27/2016] [Indexed: 10/20/2022]
Abstract
Climate change and fisheries are transforming the oceans, but we lack a complete understanding of their ecological impact [1-3]. Environmental degradation can cause maladaptive habitat selection, inducing ecological traps with profound consequences for biodiversity [4-6]. However, whether ecological traps operate in marine systems is unclear [7]. Large marine vertebrates may be vulnerable to ecological traps [6], but their broad-scale movements and complex life histories obscure the population-level consequences of habitat selection [8, 9]. We satellite tracked postnatal dispersal in African penguins (Spheniscus demersus) from eight sites across their breeding range to test whether they have become ecologically trapped in the degraded Benguela ecosystem. Bayesian state-space and habitat models show that penguins traversed thousands of square kilometers to areas of low sea surface temperatures (14.5°C-17.5°C) and high chlorophyll-a (∼11 mg m-3). These were once reliable cues for prey-rich waters, but climate change and industrial fishing have depleted forage fish stocks in this system [10, 11]. Juvenile penguin survival is low in populations selecting degraded areas, and Bayesian projection models suggest that breeding numbers are ∼50% lower than if non-impacted habitats were used, revealing the extent and effect of a marine ecological trap for the first time. These cascading impacts of localized forage fish depletion-unobserved in studies on adults-were only elucidated via broad-scale movement and demographic data on juveniles. Our results support suspending fishing when prey biomass drops below critical thresholds [12, 13] and suggest that mitigation of marine ecological traps will require matching conservation action to the scale of ecological processes [14].
Collapse
Affiliation(s)
- Richard B Sherley
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK; Bristol Zoological Society, Bristol Zoo Gardens, Bristol BS8 3HA, UK; Animal Demography Unit, Department of Biological Sciences, University of Cape Town, Rondebosch 7701, South Africa.
| | - Katrin Ludynia
- Marine Research Institute, University of Cape Town, Rondebosch 7701, South Africa
| | - Bruce M Dyer
- Oceans and Coasts Branch, Department of Environmental Affairs, Cape Town 8000, South Africa
| | - Tarron Lamont
- Marine Research Institute, University of Cape Town, Rondebosch 7701, South Africa; Oceans and Coasts Branch, Department of Environmental Affairs, Cape Town 8000, South Africa
| | - Azwianewi B Makhado
- Oceans and Coasts Branch, Department of Environmental Affairs, Cape Town 8000, South Africa
| | - Jean-Paul Roux
- Animal Demography Unit, Department of Biological Sciences, University of Cape Town, Rondebosch 7701, South Africa; Ministry of Fisheries and Marine Resources, PO Box 394, Lüderitz, Namibia
| | - Kylie L Scales
- Institute of Marine Sciences, University of California, Santa Cruz, Santa Cruz, CA 95064, USA; National Oceanic and Atmospheric Administration (NOAA) Southwest Fisheries Science Center, Environmental Research Division, 99 Pacific Street, Suite 255A, Monterey, CA 93940, USA; School of Science and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia
| | - Les G Underhill
- Animal Demography Unit, Department of Biological Sciences, University of Cape Town, Rondebosch 7701, South Africa; Marine Research Institute, University of Cape Town, Rondebosch 7701, South Africa
| | - Stephen C Votier
- Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK.
| |
Collapse
|
40
|
Alcolombri U, Lei L, Meltzer D, Vardi A, Tawfik DS. Assigning the Algal Source of Dimethylsulfide Using a Selective Lyase Inhibitor. ACS Chem Biol 2017; 12:41-46. [PMID: 28103686 DOI: 10.1021/acschembio.6b00844] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Atmospheric dimethylsulfide (DMS) is massively produced in the oceans by bacteria, algae, and corals. To enable identification of DMS sources, we developed a potent mechanism-based inhibitor of the algal Alma dimethylsulfoniopropionate lyase family that does not inhibit known bacterial lyases. Its application to coral holobiont indicates that DMS originates from Alma lyase(s). This biochemical profiling may complement meta-genomics and transcriptomics to provide better understanding of the marine sulfur cycle.
Collapse
Affiliation(s)
- Uria Alcolombri
- Department
of Biomolecular Sciences and ‡Department of Plant and Environmental
Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Lei Lei
- Department
of Biomolecular Sciences and ‡Department of Plant and Environmental
Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Diana Meltzer
- Department
of Biomolecular Sciences and ‡Department of Plant and Environmental
Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Assaf Vardi
- Department
of Biomolecular Sciences and ‡Department of Plant and Environmental
Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Dan S. Tawfik
- Department
of Biomolecular Sciences and ‡Department of Plant and Environmental
Sciences, Weizmann Institute of Science, Rehovot, Israel
| |
Collapse
|
41
|
Taylor AR, Brownlee C, Wheeler G. Coccolithophore Cell Biology: Chalking Up Progress. ANNUAL REVIEW OF MARINE SCIENCE 2017; 9:283-310. [PMID: 27814031 DOI: 10.1146/annurev-marine-122414-034032] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Coccolithophores occupy a special position within the marine phytoplankton because of their production of intricate calcite scales, or coccoliths. Coccolithophores are major contributors to global ocean calcification and long-term carbon fluxes. The intracellular production of coccoliths requires modifications to cellular ultrastructure and metabolism that are surveyed here. In addition to calcification, which appears to have evolved with a diverse range of functions, several other remarkable features that likely underpin the ecological and evolutionary success of coccolithophores have recently been uncovered. These include complex and varied life cycle strategies related to abiotic and biotic interactions as well as a range of novel metabolic pathways and nutritional strategies. Together with knowledge of coccolithophore genetic and physiological variability, these findings are beginning to shed new light on species diversity, distribution, and ecological adaptation. Further advances in genetics and functional characterization at the cellular level will likely to lead to a rapid increase in this understanding.
Collapse
Affiliation(s)
- Alison R Taylor
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, North Carolina 28403;
| | - Colin Brownlee
- Marine Biological Association, Plymouth PL1 2PB, United Kingdom; ,
- School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, United Kingdom
| | - Glen Wheeler
- Marine Biological Association, Plymouth PL1 2PB, United Kingdom; ,
| |
Collapse
|
42
|
Kamio M, Derby CD. Finding food: how marine invertebrates use chemical cues to track and select food. Nat Prod Rep 2017; 34:514-528. [DOI: 10.1039/c6np00121a] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review covers recent research on how marine invertebrates use chemical cues to find and select food.
Collapse
Affiliation(s)
- Michiya Kamio
- Tokyo University of Marine Science and Technology
- Tokyo 108-8477
- Japan
| | | |
Collapse
|
43
|
Mollo E, Garson MJ, Polese G, Amodeo P, Ghiselin MT. Taste and smell in aquatic and terrestrial environments. Nat Prod Rep 2017; 34:496-513. [DOI: 10.1039/c7np00008a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The review summarizes results up to 2017 on chemosensory cues occurring in both aquatic and terrestrial environments.
Collapse
Affiliation(s)
- E. Mollo
- National Research Council of Italy
- Institute of Biomolecular Chemistry
- Italy
| | - M. J. Garson
- University of Queensland
- School of Chemistry and Molecular Sciences
- Brisbane Q 4072
- Australia
| | - G. Polese
- University of Naples “Federico II”
- Department of Biology
- 80126 Naples
- Italy
| | - P. Amodeo
- National Research Council of Italy
- Institute of Biomolecular Chemistry
- Italy
| | - M. T. Ghiselin
- California Academy of Sciences
- Department of Invertebrate Zoology
- San Francisco
- USA
| |
Collapse
|
44
|
Savoca MS, Wohlfeil ME, Ebeler SE, Nevitt GA. Marine plastic debris emits a keystone infochemical for olfactory foraging seabirds. SCIENCE ADVANCES 2016; 2:e1600395. [PMID: 28861463 PMCID: PMC5569953 DOI: 10.1126/sciadv.1600395] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 10/06/2016] [Indexed: 05/18/2023]
Abstract
Plastic debris is ingested by hundreds of species of organisms, from zooplankton to baleen whales, but how such a diversity of consumers can mistake plastic for their natural prey is largely unknown. The sensory mechanisms underlying plastic detection and consumption have rarely been examined within the context of sensory signals driving marine food web dynamics. We demonstrate experimentally that marine-seasoned microplastics produce a dimethyl sulfide (DMS) signature that is also a keystone odorant for natural trophic interactions. We further demonstrate a positive relationship between DMS responsiveness and plastic ingestion frequency using procellariiform seabirds as a model taxonomic group. Together, these results suggest that plastic debris emits the scent of a marine infochemical, creating an olfactory trap for susceptible marine wildlife.
Collapse
Affiliation(s)
- Matthew S. Savoca
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, Davis, CA 95616, USA
- Graduate Group in Ecology, University of California, Davis, Davis, CA 95616, USA
- Corresponding author. (M.S.S.); (G.A.N.)
| | - Martha E. Wohlfeil
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, Davis, CA 95616, USA
- Graduate Group in Ecology, University of California, Davis, Davis, CA 95616, USA
| | - Susan E. Ebeler
- Department of Viticulture and Enology, University of California, Davis, Davis, CA 95616, USA
| | - Gabrielle A. Nevitt
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, Davis, CA 95616, USA
- Graduate Group in Ecology, University of California, Davis, Davis, CA 95616, USA
- Corresponding author. (M.S.S.); (G.A.N.)
| |
Collapse
|
45
|
A high-resolution time-depth view of dimethylsulphide cycling in the surface sea. Sci Rep 2016; 6:32325. [PMID: 27578300 PMCID: PMC5006029 DOI: 10.1038/srep32325] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 08/04/2016] [Indexed: 11/08/2022] Open
Abstract
Emission of the trace gas dimethylsulphide (DMS) from the ocean influences the chemical and optical properties of the atmosphere, and the olfactory landscape for foraging marine birds, turtles and mammals. DMS concentration has been seen to vary across seasons and latitudes with plankton taxonomy and activity, and following the seascape of ocean's physics. However, whether and how does it vary at the time scales of meteorology and day-night cycles is largely unknown. Here we used high-resolution measurements over time and depth within coherent water patches in the open sea to show that DMS concentration responded rapidly but resiliently to mesoscale meteorological perturbation. Further, it varied over diel cycles in conjunction with rhythmic photobiological indicators in phytoplankton. Combining data and modelling, we show that sunlight switches and tunes the balance between net biological production and abiotic losses. This is an outstanding example of how biological diel rhythms affect biogeochemical processes.
Collapse
|
46
|
Natural search algorithms as a bridge between organisms, evolution, and ecology. Proc Natl Acad Sci U S A 2016; 113:9413-20. [PMID: 27496324 DOI: 10.1073/pnas.1606195113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The ability to navigate is a hallmark of living systems, from single cells to higher animals. Searching for targets, such as food or mates in particular, is one of the fundamental navigational tasks many organisms must execute to survive and reproduce. Here, we argue that a recent surge of studies of the proximate mechanisms that underlie search behavior offers a new opportunity to integrate the biophysics and neuroscience of sensory systems with ecological and evolutionary processes, closing a feedback loop that promises exciting new avenues of scientific exploration at the frontier of systems biology.
Collapse
|
47
|
Roman J, Nevins J, Altabet M, Koopman H, McCarthy J. Endangered Right Whales Enhance Primary Productivity in the Bay of Fundy. PLoS One 2016; 11:e0156553. [PMID: 27331902 PMCID: PMC4917091 DOI: 10.1371/journal.pone.0156553] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Accepted: 05/16/2016] [Indexed: 11/18/2022] Open
Abstract
Marine mammals have recently been documented as important facilitators of rapid and efficient nutrient recycling in coastal and offshore waters. Whales enhance phytoplankton nutrition by releasing fecal plumes near the surface after feeding and by migrating from highly productive, high-latitude feeding areas to low-latitude nutrient-poor calving areas. In this study, we measured NH4+ and PO43- release rates from the feces of North Atlantic right whales (Eubalaena glacialis), a highly endangered baleen whale. Samples for this species were primarily collected by locating aggregations of whales in surface-active groups (SAGs), which typically consist of a central female surrounded by males competing for sexual activity. When freshly collected feces were incubated in seawater, high initial rates of N release were generally observed, which decreased to near zero within 24 hours of sampling, a pattern that is consistent with the active role of gut microflora on fecal particles. We estimate that at least 10% of particulate N in whale feces becomes available as NH4+ within 24 hours of defecation. Phosphorous was also abundant in fecal samples: initial release rates of PO43- were higher than for NH4+, yielding low N/P nutrient ratios over the course of our experiments. The rate of PO43- release was thus more than sufficient to preclude the possibility that nitrogenous nutrients supplied by whales would lead to phytoplankton production limited by P availability. Phytoplankton growth experiments indicated that NH4+ released from whale feces enhance productivity, as would be expected, with no evidence that fecal metabolites suppress growth. Although North Atlantic right whales are currently rare (approximately 450 individuals), they once numbered about 14,000 and likely played a substantial role in recycling nutrients in areas where they gathered to feed and mate. Even though the NH4+ released from fresh whale fecal material is a small fraction of total whale fecal nitrogen, and recognizing the fact that the additional nitrogen released in whale urine would be difficult to measure in a field study, the results of this study support the idea that the distinctive isotopic signature of the released NH4+ could be used to provide a conservative estimate of the contribution of the whale pump to primary productivity in coastal regions where whales congregate.
Collapse
Affiliation(s)
- Joe Roman
- Gund Institute for Ecological Economics, University of Vermont, Burlington, Vermont, United States of America
- * E-mail:
| | - John Nevins
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America
| | - Mark Altabet
- Department of Estuarine and Ocean Science, University of Massachusetts Dartmouth, Dartmouth, Massachusetts, United States of America
| | - Heather Koopman
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, North Carolina, United States of America
| | - James McCarthy
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America
| |
Collapse
|
48
|
de Rijk M, Yang D, Engel B, Dicke M, Poelman EH. Feeding guild of non-host community members affects host-foraging efficiency of a parasitic wasp. Ecology 2016; 97:1388-99. [DOI: 10.1890/15-1300.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Marjolein de Rijk
- Laboratory of Entomology; Wageningen University; P.O. Box 16 6700 AA Wageningen the Netherlands
| | - Daowei Yang
- Laboratory of Entomology; Wageningen University; P.O. Box 16 6700 AA Wageningen the Netherlands
| | - Bas Engel
- Biometris; Wageningen University; P.O. Box 100 6700 AC Wageningen the Netherlands
| | - Marcel Dicke
- Laboratory of Entomology; Wageningen University; P.O. Box 16 6700 AA Wageningen the Netherlands
| | - Erik H. Poelman
- Laboratory of Entomology; Wageningen University; P.O. Box 16 6700 AA Wageningen the Netherlands
| |
Collapse
|
49
|
Vermeij GJ. Plant defences on land and in water: why are they so different? ANNALS OF BOTANY 2016; 117:1099-109. [PMID: 27091505 PMCID: PMC4904178 DOI: 10.1093/aob/mcw061] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 02/22/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Plants (attached photosynthesizing organisms) are eaten by a wide variety of herbivorous animals. Despite a vast literature on plant defence, contrasting patterns of antiherbivore adaptation among marine, freshwater and land plants have been little noticed, documented or understood. SCOPE Here I show how the surrounding medium (water or air) affects not only the plants themselves, but also the sensory and locomotor capacities of herbivores and their predators, and I discuss patterns of defence and host specialization of plants and herbivores on land and in water. I analysed the literature on herbivory with special reference to mechanical defences and sensory cues emitted by plants. Spines, hairs, asymmetrically oriented features on plant surfaces, and visual and olfactory signals that confuse or repel herbivores are common in land plants but rare or absent in water-dwelling plants. Small terrestrial herbivores are more often host-specific than their aquatic counterparts. I propose that patterns of selection on terrestrial herbivores and plants differ from those on aquatic species. Land plants must often attract animal dispersers and pollinators that, like their herbivorous counterparts, require sophisticated locomotor and sensory abilities. Plants counter their attractiveness to animal helpers by evolving effective contact defences and long-distance cues that mislead or warn herbivores. The locomotor and sensory world of small aquatic herbivores is more limited. These characteristics result from the lower viscosity and density of air compared with water as well as from limitations on plant physiology and signal transmission in water. Evolutionary innovations have not eliminated the contrasts in the conditions of life between water and land. CONCLUSION Plant defence can be understood fully when herbivores and their victims are considered in the broader context of other interactions among coexisting species and of the medium in which these interactions occur.
Collapse
Affiliation(s)
- Geerat J Vermeij
- University of California, Davis, Department of Earth and Planetary Sciences, One Shields Avenue, Davis, CA 95616, USA
| |
Collapse
|
50
|
Abstract
Covering: January 2013 to online publication December 2014This review summarizes recent research in the chemical ecology of marine pelagic ecosystems, and aims to provide a comprehensive overview of advances in the field in the time period covered. In order to highlight the role of chemical cues and toxins in plankton ecology this review has been organized by ecological interaction types starting with intraspecific interactions, then interspecific interactions (including facilitation and mutualism, host-parasite, allelopathy, and predator-prey), and finally community and ecosystem-wide interactions.
Collapse
Affiliation(s)
- Emily R Schwartz
- School of Biology, Aquatic Chemical Ecology Center, Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA.
| | | | | | | |
Collapse
|