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Lovell RSL, Collins S, Martin SH, Pigot AL, Phillimore AB. Space-for-time substitutions in climate change ecology and evolution. Biol Rev Camb Philos Soc 2023; 98:2243-2270. [PMID: 37558208 DOI: 10.1111/brv.13004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/11/2023]
Abstract
In an epoch of rapid environmental change, understanding and predicting how biodiversity will respond to a changing climate is an urgent challenge. Since we seldom have sufficient long-term biological data to use the past to anticipate the future, spatial climate-biotic relationships are often used as a proxy for predicting biotic responses to climate change over time. These 'space-for-time substitutions' (SFTS) have become near ubiquitous in global change biology, but with different subfields largely developing methods in isolation. We review how climate-focussed SFTS are used in four subfields of ecology and evolution, each focussed on a different type of biotic variable - population phenotypes, population genotypes, species' distributions, and ecological communities. We then examine the similarities and differences between subfields in terms of methods, limitations and opportunities. While SFTS are used for a wide range of applications, two main approaches are applied across the four subfields: spatial in situ gradient methods and transplant experiments. We find that SFTS methods share common limitations relating to (i) the causality of identified spatial climate-biotic relationships and (ii) the transferability of these relationships, i.e. whether climate-biotic relationships observed over space are equivalent to those occurring over time. Moreover, despite widespread application of SFTS in climate change research, key assumptions remain largely untested. We highlight opportunities to enhance the robustness of SFTS by addressing key assumptions and limitations, with a particular emphasis on where approaches could be shared between the four subfields.
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Affiliation(s)
- Rebecca S L Lovell
- Ashworth Laboratories, Institute of Ecology and Evolution, The University of Edinburgh, Charlotte Auerbach Road, Edinburgh, EH9 3FL, UK
| | - Sinead Collins
- Ashworth Laboratories, Institute of Ecology and Evolution, The University of Edinburgh, Charlotte Auerbach Road, Edinburgh, EH9 3FL, UK
| | - Simon H Martin
- Ashworth Laboratories, Institute of Ecology and Evolution, The University of Edinburgh, Charlotte Auerbach Road, Edinburgh, EH9 3FL, UK
| | - Alex L Pigot
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, Gower Street, London, WC1E 6BT, UK
| | - Albert B Phillimore
- Ashworth Laboratories, Institute of Ecology and Evolution, The University of Edinburgh, Charlotte Auerbach Road, Edinburgh, EH9 3FL, UK
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2
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Hyndes GA, Berdan EL, Duarte C, Dugan JE, Emery KA, Hambäck PA, Henderson CJ, Hubbard DM, Lastra M, Mateo MA, Olds A, Schlacher TA. The role of inputs of marine wrack and carrion in sandy-beach ecosystems: a global review. Biol Rev Camb Philos Soc 2022; 97:2127-2161. [PMID: 35950352 PMCID: PMC9804821 DOI: 10.1111/brv.12886] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 06/26/2022] [Accepted: 06/29/2022] [Indexed: 01/09/2023]
Abstract
Sandy beaches are iconic interfaces that functionally link the ocean with the land via the flow of organic matter from the sea. These cross-ecosystem fluxes often comprise uprooted seagrass and dislodged macroalgae that can form substantial accumulations of detritus, termed 'wrack', on sandy beaches. In addition, the tissue of the carcasses of marine animals that regularly wash up on beaches form a rich food source ('carrion') for a diversity of scavenging animals. Here, we provide a global review of how wrack and carrion provide spatial subsidies that shape the structure and functioning of sandy-beach ecosystems (sandy beaches and adjacent surf zones), which typically have little in situ primary production. We also examine the spatial scaling of the influence of these processes across the broader land- and seascape, and identify key gaps in our knowledge to guide future research directions and priorities. Large quantities of detrital kelp and seagrass can flow into sandy-beach ecosystems, where microbial decomposers and animals process it. The rates of wrack supply and its retention are influenced by the oceanographic processes that transport it, the geomorphology and landscape context of the recipient beaches, and the condition, life history and morphological characteristics of the macrophyte taxa that are the ultimate source of wrack. When retained in beach ecosystems, wrack often creates hotspots of microbial metabolism, secondary productivity, biodiversity, and nutrient remineralization. Nutrients are produced during wrack breakdown, and these can return to coastal waters in surface flows (swash) and aquifers discharging into the subtidal surf. Beach-cast kelp often plays a key trophic role, being an abundant and preferred food source for mobile, semi-aquatic invertebrates that channel imported algal matter to predatory invertebrates, fish, and birds. The role of beach-cast marine carrion is likely to be underestimated, as it can be consumed rapidly by highly mobile scavengers (e.g. foxes, coyotes, raptors, vultures). These consumers become important vectors in transferring marine productivity inland, thereby linking marine and terrestrial ecosystems. Whilst deposits of organic matter on sandy-beach ecosystems underpin a range of ecosystem functions and services, they can be at variance with aesthetic perceptions resulting in widespread activities, such as 'beach cleaning and grooming'. This practice diminishes the energetic base of food webs, intertidal fauna, and biodiversity. Global declines in seagrass beds and kelp forests (linked to global warming) are predicted to cause substantial reductions in the amounts of marine organic matter reaching many beach ecosystems, likely causing flow-on effects for food webs and biodiversity. Similarly, future sea-level rise and increased storm frequency are likely to alter profoundly the physical attributes of beaches, which in turn can change the rates at which beaches retain and process the influxes of wrack and animal carcasses. Conservation of the multi-faceted ecosystem services that sandy beaches provide will increasingly need to encompass a greater societal appreciation and the safeguarding of ecological functions reliant on beach-cast organic matter on innumerable ocean shores worldwide.
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Affiliation(s)
- Glenn A. Hyndes
- Centre for Marine Ecosystems Research, School of ScienceEdith Cowan UniversityJoondalupWestern AustraliaAustralia
| | - Emma L. Berdan
- Department of Marine SciencesUniversity of GothenburgGöteborgSweden
| | - Cristian Duarte
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la VidaUniversidad Andres BelloSantiagoChile
| | - Jenifer E. Dugan
- Marine Science InstituteUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Kyle A. Emery
- Marine Science InstituteUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Peter A. Hambäck
- Department of Ecology, Environment and Plant SciencesStockholm UniversityStockholmSweden
| | - Christopher J. Henderson
- School of Science, Technology, and EngineeringUniversity of the Sunshine CoastMaroochydoreQueenslandAustralia
| | - David M. Hubbard
- Marine Science InstituteUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Mariano Lastra
- Centro de Investigación Mariña, Edificio CC ExperimentaisUniversidade de Vigo, Campus de Vigo36310VigoSpain
| | - Miguel A. Mateo
- Centre for Marine Ecosystems Research, School of ScienceEdith Cowan UniversityJoondalupWestern AustraliaAustralia
- Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones CientíficasBlanesSpain
| | - Andrew Olds
- School of Science, Technology, and EngineeringUniversity of the Sunshine CoastMaroochydoreQueenslandAustralia
| | - Thomas A. Schlacher
- School of Science, Technology, and EngineeringUniversity of the Sunshine CoastMaroochydoreQueenslandAustralia
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3
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Fletcher LS, Bolander M, Reese TC, Asay EG, Pinkston E, Griffen BD. Metabolic rates of the Asian shore crab Hemigrapsus sanguineus in air as a function of body size, location, and injury. Ecol Evol 2022; 12:e9297. [PMID: 36177136 PMCID: PMC9463042 DOI: 10.1002/ece3.9297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/18/2022] [Accepted: 08/25/2022] [Indexed: 11/07/2022] Open
Abstract
Rapid warming in the Gulf of Maine may influence the success or invasiveness of the Asian shore crab, Hemigrapsus sanguineus. To better predict the effects of climate change on this invasive species, it is necessary to measure its energy dynamics under a range of conditions. However, previous research has only focused on the metabolism of this intertidal species in water. We sampled adult crabs from three different sites and measured their metabolic rates in the air. We show that metabolic rate increases with body mass and the number of missing limbs, but decreases with the number of regenerating limbs, possibly reflecting the timing of energy allocation to limb regeneration. Importantly, metabolic rates measured here in the air are ~4× higher than metabolic rates previously measured for this species in water. Our results provide baseline measurements of aerial metabolic rates across body sizes, which may be affected by climate change. With a better understanding of respiration in H. sanguineus, we can make more informed predictions about the combined effects of climate change and invasive species on the northeast coasts of North America.
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Affiliation(s)
| | | | | | | | - Emily Pinkston
- Department of BiologyBrigham Young UniversityProvoUtahUSA
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4
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Future Climate Change Conditions May Compromise Metabolic Performance in Juveniles of the Mud Crab Scylla serrata. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2022. [DOI: 10.3390/jmse10050582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Research characterising the effects of future climate change on the marine environment remains heavily focussed on that of temperate regions and organisms. Furthermore, little is known of these effects on the early life stages of many marine species. Tropical regions are already experiencing an increase in sea surface temperature and decrease in sea surface salinity, conditions favoured by pathogenic bacteria such as Vibrio spp. The early life stages of crabs are known to be particularly vulnerable to both the direct physiological effects of climate change and exposure to harmful microorganisms, yet there are limited data on these effects on juveniles of many tropical crustacean species. This study assessed the metabolic responses of mud crab (Scylla serrata) juveniles to warming and/or freshening in the presence or absence of pathogenic bacteria in southwest India. Juvenile crabs were exposed to either ambient (28 °C/30 PSU) or one of three projected climate change regimes (28 °C/20 PSU (freshening), 32 °C/30 PSU (warming), 32 °C/20 PSU (warming + freshening)) for 10 days, in either the presence or absence of the pathogenic bacteria Vibrio parahaemolyticus. Results show that simulated climate change conditions, especially freshening, caused a significant increase in oxygen consumption rates (MO2), and that these were further increased when juveniles were exposed to V. parahaemolyticus. These results suggest that the effects of future climate change conditions could have significant implications for the conservation of wild stocks and commercial farming of this species in South Asia.
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Macedo TP, Zhao Q, Costa NV, Freire AS. Ocean temperature and density dependence as key drivers of the population dynamics of an intertidal crab at the Brazilian oceanic islands. POPUL ECOL 2022. [DOI: 10.1002/1438-390x.12126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Thais P. Macedo
- Laboratório de Crustáceos e Plâncton, Departamento de Ecologia e Zoologia Universidade Federal de Santa Catarina Florianópolis Brazil
| | - Qing Zhao
- School of Natural Resources University of Missouri Columbia Missouri USA
| | - Natasha V. Costa
- Departmento de Oceanografia Universidade Federal de Santa Catarina Florianópolis Brazil
| | - Andrea S. Freire
- Laboratório de Crustáceos e Plâncton, Departamento de Ecologia e Zoologia Universidade Federal de Santa Catarina Florianópolis Brazil
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6
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Maia S, Marques SC, Dupont S, Neves M, Pinto HJ, Reis J, Leandro SM. Effects of ocean acidification and warming on the development and biochemical responses of juvenile shrimp Palaemon elegans (Rathke, 1837). MARINE ENVIRONMENTAL RESEARCH 2022; 176:105580. [PMID: 35298941 DOI: 10.1016/j.marenvres.2022.105580] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 01/30/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Anthropogenic CO2 emissions have led to the warming and acidification of the oceans. Although, there is a growing of evidence showing that simultaneous occurrence of ocean acidification and ocean warming are threats to marine organisms, information on their combined effect on coastal shrimp species remains scarce. The purpose of this study was to estimate the combined effects of seawater acidification and warming on growth-related traits and biochemical responses of P. elegans juveniles. In this work, shrimp were exposed for 65 days at 4 experimental conditions: pH 8.10 * 18 °C, pH 7.80 * 18 °C, pH 8.10 * 22 °C, pH 7.80 * 22 °C. The results showed that low pH decreases the lipid content by ∼13% (p < 0.05). Higher temperature reduced the condition factor by ∼11%, the protein content by ∼20%, the PUFA by ∼8,6% and shortened moulting events by 5 days (p > 0.05) while the SFA increased ∼9.4%. The decrease in condition factor and protein was however more prominent in organisms exposed to the combination of pH and temperature with a decrease of ∼13% and ∼21%, respectively. Furthermore, essential fatty acids as EPA and DHA also decreased by ∼20% and ∼6.6% in low pH and higher temperature condition. Despite this study suggest that warming may have a greater impact than acidification, it has been shown that their combined effect can exacerbate these impacts with consequences for the shrimp's body size and biochemical profile.
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Affiliation(s)
- Simão Maia
- MARE-Marine and Environmental Sciences Centre, Polytechnic of Leiria, 2520-630, Peniche, Portugal.
| | - Sónia C Marques
- MARE-Marine and Environmental Sciences Centre, Polytechnic of Leiria, 2520-630, Peniche, Portugal
| | - Sam Dupont
- Department of Biological and Environmental Sciences, University of Gothenburg, The Sven Lovén Centre for Marine Infrastructure, Kristineberg, Fiskebäckskil, 45178, Sweden; Radioecology Laboratory International Atomic Energy Agency (IAEA), Marine Laboratories, 4 Quai Antoine Ier, 98000, Principality of Monaco
| | - Marta Neves
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-641, Peniche, Portugal
| | - Henrique J Pinto
- MARE-Marine and Environmental Sciences Centre, Polytechnic of Leiria, 2520-630, Peniche, Portugal
| | - João Reis
- MARE-Marine and Environmental Sciences Centre, Polytechnic of Leiria, 2520-630, Peniche, Portugal
| | - Sérgio M Leandro
- MARE-Marine and Environmental Sciences Centre, ESTM, Polytechnic of Leiria, 2520-641, Peniche, Portugal.
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7
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Gross CP, Duffy JE, Hovel KA, Kardish MR, Reynolds PL, Boström C, Boyer KE, Cusson M, Eklöf J, Engelen AH, Eriksson BK, Fodrie FJ, Griffin JN, Hereu CM, Hori M, Hughes AR, Ivanov MV, Jorgensen P, Kruschel C, Lee KS, Lefcheck J, McGlathery K, Moksnes PO, Nakaoka M, O'Connor MI, O'Connor NE, Olsen JL, Orth RJ, Peterson BJ, Reiss H, Rossi F, Ruesink J, Sotka EE, Thormar J, Tomas F, Unsworth R, Voigt EP, Whalen MA, Ziegler SL, Stachowicz JJ. The biogeography of community assembly: latitude and predation drive variation in community trait distribution in a guild of epifaunal crustaceans. Proc Biol Sci 2022; 289:20211762. [PMID: 35193403 PMCID: PMC8864368 DOI: 10.1098/rspb.2021.1762] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 01/14/2022] [Indexed: 01/15/2023] Open
Abstract
While considerable evidence exists of biogeographic patterns in the intensity of species interactions, the influence of these patterns on variation in community structure is less clear. Studying how the distributions of traits in communities vary along global gradients can inform how variation in interactions and other factors contribute to the process of community assembly. Using a model selection approach on measures of trait dispersion in crustaceans associated with eelgrass (Zostera marina) spanning 30° of latitude in two oceans, we found that dispersion strongly increased with increasing predation and decreasing latitude. Ocean and epiphyte load appeared as secondary predictors; Pacific communities were more overdispersed while Atlantic communities were more clustered, and increasing epiphytes were associated with increased clustering. By examining how species interactions and environmental filters influence community structure across biogeographic regions, we demonstrate how both latitudinal variation in species interactions and historical contingency shape these responses. Community trait distributions have implications for ecosystem stability and functioning, and integrating large-scale observations of environmental filters, species interactions and traits can help us predict how communities may respond to environmental change.
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Affiliation(s)
- Collin P. Gross
- Department of Evolution and Ecology, University of California, Davis, CA, USA
| | - J. Emmett Duffy
- Tennenbaum Marine Observatories Network, MarineGEO, Smithsonian Environmental Research Center, Edgewater, MD, USA
| | - Kevin A. Hovel
- Department of Biology, San Diego State University, San Diego, CA, USA
| | - Melissa R. Kardish
- Department of Evolution and Ecology, University of California, Davis, CA, USA
| | - Pamela L. Reynolds
- DataLab: Data Science and Informatics, University of California, Davis, CA, USA
| | - Christoffer Boström
- Department of Environmental and Marine Biology, Åbo Akademi University, Åbo, Finland
| | - Katharyn E. Boyer
- Estuary & Ocean Science Center and Department of Biology, San Francisco State University, San Francisco, CA, USA
| | - Mathieu Cusson
- Sciences fondamentales and Québec Océan, Université du Québec à Chicoutimi, Chicoutimi, Quebec, Canada
| | - Johan Eklöf
- Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden
| | | | | | - F. Joel Fodrie
- Institute of Marine Sciences, University of North Carolina at Chapel Hill, Morehead City, NC, USA
| | | | - Clara M. Hereu
- Universidad Autónoma de Baja California, Mexicali, Baja CA, Mexico
| | - Masakazu Hori
- Fisheries Research and Education Agency, Hatsukaichi, Hiroshima, Japan
| | - A. Randall Hughes
- Department of Marine and Environmental Sciences, Northeastern University, Nahant, MA, USA
| | - Mikhail V. Ivanov
- Department of Ichthyology and Hydrobiology, St Petersburg State University, St Petersburg, Russia
| | - Pablo Jorgensen
- Instituto de Ciencias Polares, Ambiente y Recursos Naturales, Universidad Nacional de Tierra del Fuego, Ushuaia, Tierra del Fuego, Antártida e Islas del Atlántico Sur, Argentina
| | | | - Kun-Seop Lee
- Department of Biological Sciences, Pusan National University, Busan, South Korea
| | - Jonathan Lefcheck
- DataLab: Data Science and Informatics, University of California, Davis, CA, USA
| | - Karen McGlathery
- Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA
| | - Per-Olav Moksnes
- Department of Marine Sciences, University of Gothenburg, Goteborg, Sweden
| | | | - Mary I. O'Connor
- Biodiversity Research Centre and Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nessa E. O'Connor
- School of Natural Sciences, Trinity College Dublin, Dublin, Republic of Ireland
| | | | - Robert J. Orth
- Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA, USA
| | - Bradley J. Peterson
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, USA
| | | | - Francesca Rossi
- Centre National de la Récherche Scientifique, ECOSEAS Laboratory, Université de Cote d'Azur, Nice, France
| | - Jennifer Ruesink
- Department of Biology, University of Washington, Seattle, WA, USA
| | - Erik E. Sotka
- Grice Marine Laboratory, College of Charleston, Charleston, SC, USA
| | | | - Fiona Tomas
- IMEDEAS (CSIC), Esporles, Islas Baleares, Spain
| | | | - Erin P. Voigt
- Department of Biology, San Diego State University, San Diego, CA, USA
| | - Matthew A. Whalen
- Hakai Institute, Campbell River, British Columbia, Canada
- University of British Columbia, Vancouver, British Columbia, Canada
| | | | - John J. Stachowicz
- Department of Evolution and Ecology, University of California, Davis, CA, USA
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8
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Lowman HE, Emery KA, Dugan JE, Miller RJ. Nutritional quality of giant kelp declines due to warming ocean temperatures. OIKOS 2021. [DOI: 10.1111/oik.08619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Heili E. Lowman
- Dept of Ecology, Evolution and Marine Biology, Univ. of California Santa Barbara CA USA
| | - Kyle A. Emery
- Marine Science Inst., Univ. of California Santa Barbara CA USA
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9
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Emery KA, Dugan JE, Bailey RA, Miller RJ. Species identity drives ecosystem function in a subsidy-dependent coastal ecosystem. Oecologia 2021; 196:1195-1206. [PMID: 34324077 DOI: 10.1007/s00442-021-05002-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 07/21/2021] [Indexed: 10/20/2022]
Abstract
Declines in species diversity carry profound implications for ecosystem functioning. Communities of primary producers and consumers interact on evolutionary as well as ecological time scales, shaping complex relationships between biodiversity and ecosystem functioning. In subsidized ecosystems, resource inputs are independent of consumer actions, offering a simplified view of the relationship between species diversity and function for higher trophic levels. With food webs supported by substantial but variable inputs of detritus from adjacent marine ecosystems, sandy beaches are classic examples of subsidized ecosystems. We investigated effects of consumer species diversity and identity on a key ecological function, consumption of kelp wrack from nearshore giant kelp (Macrocystis pyrifera) forests. We assessed effects of species richness on kelp consumption by experimentally manipulating richness of six common species of invertebrate detritivores in laboratory mesocosms and conducting field assays of kelp consumption on beaches. Consumer richness had no effect on kelp consumption in the field and a slight negative effect in laboratory experiments. Kelp consumption was most strongly affected by the species composition of the detritivore community. Species identity and body size of intertidal detritivores drove variation in kelp consumption rates in both experiments and field assays. Our results provide further evidence that species traits, rather than richness per se, influence ecosystem function most, particularly in detrital-based food webs with high functional redundancy across species. On sandy beaches, where biodiversity is threatened by rising sea levels and expanding development, our findings suggest that loss of large-bodied consumer species could disproportionally impact ecosystem function.
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Affiliation(s)
- Kyle A Emery
- Marine Science Institute, University of California, Santa Barbara, CA, USA.
| | - Jenifer E Dugan
- Marine Science Institute, University of California, Santa Barbara, CA, USA
| | - R A Bailey
- School of Mathematics and Statistics, University of St Andrews, St Andrews, KY16 9SS, Fife, UK
| | - Robert J Miller
- Marine Science Institute, University of California, Santa Barbara, CA, USA
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10
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Prez-Schultheiss J, Fernndez LD, Ribeiro FB. Designation of a neotype for Orchestoidea tuberculata Nicolet, 1849 (Amphipoda: Senticaudata: Talitridae), a monotypic sandhopper endemic to the southeastern Pacific coast. Zootaxa 2021; 4999:377-388. [PMID: 34810476 DOI: 10.11646/zootaxa.4999.4.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Indexed: 11/04/2022]
Abstract
The genus Orchestoidea Nicolet, 1849 is geographically restricted to sandy beaches of the southeastern Pacific coast of Chile, being found from 23S (Antofagasta, northern Chile) to 45S (Guamblin Island, southern Chile), along a latitudinal gradient of ca. 2,400 km. Orchestoidea tuberculata Nicolet, 1849, the only known species for the genus, was originally described from Valparaso Bay, central Chile (33S). However, the published morphological descriptions are incomplete and a comparison with populations along the entire distributional range is difficult, because the type material is considered lost. In this paper, we selected a male specimen recently obtained from a site close to the type locality, to designate a neotype for O. tuberculata. A detailed description and illustrations of this specimen are also provided to establish a basis for further analysis of Orchestoidea.
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Affiliation(s)
- Jorge Prez-Schultheiss
- rea de Zoologa de Invertebrados, Museo Nacional de Historia Natural, Casilla 787, Correo Central, Santiago, Chile. Programa de Ps-Graduao em Biologia Animal, Instituto de Biocincias, Universidade Federal do Rio Grande do Sul. Porto Alegre, Rio Grande do Sul, Brazil. Departamento de Zoologia (Laboratrio de Carcinologia), Instituto de Biocincias, Universidade Federal do Rio Grande do Sul. Porto Alegre, Rio Grande do Sul, Brazil..
| | - Leonardo D Fernndez
- Centro de Investigacin en Recursos Naturales y Sustentabilidad (CIRENYS), Universidad Bernardo OHiggins, Avenida Viel 1497, Santiago, Chile..
| | - Felipe Bezerra Ribeiro
- Programa de Ps-Graduao em Biologia Animal, Instituto de Biocincias, Universidade Federal do Rio Grande do Sul. Porto Alegre, Rio Grande do Sul, Brazil. Departamento de Zoologia (Laboratrio de Carcinologia), Instituto de Biocincias, Universidade Federal do Rio Grande do Sul. Porto Alegre, Rio Grande do Sul, Brazil..
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11
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Johnson DS, Crowley C, Longmire K, Nelson J, Williams B, Wittyngham S. The fiddler crab, Minuca pugnax, follows Bergmann's rule. Ecol Evol 2019; 9:14489-14497. [PMID: 31938535 PMCID: PMC6953695 DOI: 10.1002/ece3.5883] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 10/25/2019] [Accepted: 10/28/2019] [Indexed: 11/29/2022] Open
Abstract
Bergmann's rule predicts that organisms at higher latitudes are larger than ones at lower latitudes. Here, we examine the body size pattern of the Atlantic marsh fiddler crab, Minuca pugnax (formerly Uca pugnax), from salt marshes on the east coast of the United States across 12 degrees of latitude. We found that M. pugnax followed Bergmann's rule and that, on average, crab carapace width increased by 0.5 mm per degree of latitude. Minuca pugnax body size also followed the temperature-size rule with body size inversely related to mean water temperature. Because an organism's size influences its impact on an ecosystem, and M. pugnax is an ecosystem engineer that affects marsh functioning, the larger crabs at higher latitudes may have greater per-capita impacts on salt marshes than the smaller crabs at lower latitudes.
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Affiliation(s)
| | | | | | | | | | - Serina Wittyngham
- Virginia Institute of Marine ScienceWilliam & MaryGloucester PointVAUSA
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12
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Haye PA, Segovia NI, Varela AI, Rojas R, Rivadeneira MM, Thiel M. Genetic and morphological divergence at a biogeographic break in the beach-dwelling brooder Excirolana hirsuticauda Menzies (Crustacea, Peracarida). BMC Evol Biol 2019; 19:118. [PMID: 31185884 PMCID: PMC6560899 DOI: 10.1186/s12862-019-1442-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 05/27/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND There is a biogeographic break located at 30°S in the southeast Pacific, in a coastal area of strong environmental discontinuities. Several marine benthic taxa with restricted dispersal have a coincident phylogeographic break at 30°S, indicating that genetic structure is moulded by life history traits that limit gene flow and thereby promote divergence and speciation. In order to evaluate intraspecific divergence at this biogeographic break, we investigated the genetic and morphological variation of the directly developing beach isopod Excirolana hirsuticauda along 1900 km of the southeast Pacific coast, across 30°S. RESULTS The COI sequences and microsatellite data both identified a strong discontinuity between populations of E. hirsuticauda to the north and south of 30°S, and a second weaker phylogeographic break at approximately 35°S. The three genetic groups were evidenced by different past demographic and genetic diversity signatures, and were also clearly distinguished with microsatellite data clustering. The COI sequences established that the genetic divergence of E. hirsuticauda at 30°S started earlier than divergence at 35°. Additionally, the three groups have different past demographic signatures, with probable demographic expansion occurring earlier in the southern group (south of 35°S), associated with Pleistocene interglacial periods. Interestingly, body length, multivariate morphometric analyses, and the morphology of a fertilization-related morphological character in males, the appendix masculina, reinforced the three genetic groups detected with genetic data. CONCLUSIONS The degree of divergence of COI sequences, microsatellite data, and morphology was concordant and showed two geographic areas in which divergence was promoted at differing historical periods. Variation in the appendix masculina of males has probably promoted reproductive isolation. This variation together with gene flow restrictions promoted by life history traits, small body size, oceanographic discontinuities and sandy-beach habitat continuity, likely influenced species divergence at 30°S in the southeast Pacific coast. The degree of genetic and morphological differentiation of populations to the north and south of 30°S suggests that E. hirsuticauda harbours intraspecific divergence consistent with reproductive isolation and an advanced stage of speciation. The speciation process within E. hirsuticauda has been shaped by both restrictions to gene flow and a prezygotic reproductive barrier.
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Affiliation(s)
- Pilar A. Haye
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile
| | - Nicolás I. Segovia
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile
| | - Andrea I. Varela
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile
- Núcleo Milenio de Ecología y Manejo Sustentable de Islas Oceánicas (ESMOI), Universidad Católica del Norte, Coquimbo, Chile
| | - Rodrigo Rojas
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile
| | - Marcelo M. Rivadeneira
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
| | - Martin Thiel
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo, 1281 Coquimbo, Chile
- Núcleo Milenio de Ecología y Manejo Sustentable de Islas Oceánicas (ESMOI), Universidad Católica del Norte, Coquimbo, Chile
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile
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Clark JS, Poore AGB, Doblin MA. Shaping up for stress: Physiological flexibility is key to survivorship in a habitat-forming macroalga. JOURNAL OF PLANT PHYSIOLOGY 2018; 231:346-355. [PMID: 30388674 DOI: 10.1016/j.jplph.2018.10.005] [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: 06/15/2018] [Revised: 09/09/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
Organisms from all domains of life can have highly variable morphologies, with this plasticity suggested to increase fitness and survivability under stressful conditions. Predicting how organisms will adapt to environmental change requires an understanding of how variable morphologies perform under environmental stress. Morphological plasticity has been documented within marine macroalgae inhabiting environmental gradients, however the functional consequences of this variation has been rarely tested. In this study, form-function was assessed in the habitat-forming, intertidal macroalga Hormosira banksii. Morphological variation was quantified on two spatial scales (tidal gradient versus latitudinal gradient) and the performance tested (relative water content and photosynthetic efficiency) of morphological variants during heat and desiccation stress. At regional scales, individuals at the warm distributional edge were overall smaller in size, and had smaller vesicles (higher surface area to volume ratio; SA:VOL) than those from central populations. At local scales, individuals high on the shore were generally shorter and had larger vesicles than those low on the shore. Vesicle morphology (SA:VOL) was found to predict relative water content and photosynthetic performance during desiccation and rehydration. Differences in SA:VOL of vesicles between heights on the shore may reflect water requirements needed to maintain tissue hydration for photosynthesis during low tide. Warm-edge populations showed increased thermal sensitivity as indicated by decreased photosynthetic yield of PSII and delays in recovery after desiccation. Sensitivities to higher temperatures amongst warm-edge populations are potentially due to smaller fluctuations in regional temperatures as well as their morphology. This study provides a mechanistic understanding of the morphological variation among H. banksii populations. It suggests that H. banksii has a high degree of morphological plasticity reflecting local climate, topography and environmental conditions, with this morphological variation having functional consequences. Morphological variation across local and regional scales will be important for resilience of this species to future climate warming.
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Affiliation(s)
- Jennifer S Clark
- Climate Change Cluster (C3), University of Technology Sydney, P.O. Box 123, Broadway, New South Wales, 2007, Australia.
| | - Alistair G B Poore
- Evolution and Ecology Research Centre, School of Biological Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, 2052, Australia.
| | - Martina A Doblin
- Climate Change Cluster (C3), University of Technology Sydney, P.O. Box 123, Broadway, New South Wales, 2007, Australia.
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