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Li J, Luo M, Wang S, Gauzens B, Hirt MR, Rosenbaum B, Brose U. A size-constrained feeding-niche model distinguishes predation patterns between aquatic and terrestrial food webs. Ecol Lett 2023; 26:76-86. [PMID: 36331162 DOI: 10.1111/ele.14134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 08/30/2022] [Accepted: 10/08/2022] [Indexed: 11/06/2022]
Abstract
Understanding the formation of feeding links provides insights into processes underlying food webs. Generally, predators feed on prey within a certain body-size range, but a systematic quantification of such feeding niches is lacking. We developed a size-constrained feeding-niche (SCFN) model and parameterized it with information on both realized and non-realized feeding links in 72 aquatic and 65 terrestrial food webs. Our analyses revealed profound differences in feeding niches between aquatic and terrestrial predators and variation along a temperature gradient. Specifically, the predator-prey body-size ratio and the range in prey sizes increase with the size of aquatic predators, whereas they are nearly constant across gradients in terrestrial predator size. Overall, our SCFN model well reproduces the feeding relationships and predation architecture across 137 natural food webs (including 3878 species and 136,839 realized links). Our results illuminate the organisation of natural food webs and enables novel trait-based and environment-explicit modelling approaches.
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Affiliation(s)
- Jingyi Li
- Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China.,Institute of Biodiversity, Friedrich Schiller University, Jena, Germany.,EcoNetLab, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Mingyu Luo
- Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China
| | - Shaopeng Wang
- Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China
| | - Benoit Gauzens
- Institute of Biodiversity, Friedrich Schiller University, Jena, Germany.,EcoNetLab, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Myriam R Hirt
- Institute of Biodiversity, Friedrich Schiller University, Jena, Germany.,EcoNetLab, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Benjamin Rosenbaum
- Institute of Biodiversity, Friedrich Schiller University, Jena, Germany.,EcoNetLab, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Ulrich Brose
- Institute of Biodiversity, Friedrich Schiller University, Jena, Germany.,EcoNetLab, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
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Farjalla VF, González AL, Céréghino R, Dézerald O, Marino NAC, Piccoli GCO, Richardson BA, Richardson MJ, Romero GQ, Srivastava DS. Terrestrial support of aquatic food webs depends on light inputs: a geographically-replicated test using tank bromeliads. Ecology 2018; 97:2147-2156. [PMID: 27859200 DOI: 10.1002/ecy.1432] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 03/18/2016] [Accepted: 03/22/2016] [Indexed: 12/26/2022]
Abstract
Food webs of freshwater ecosystems can be subsidized by allochthonous resources. However, it is still unknown which environmental factors regulate the relative consumption of allochthonous resources in relation to autochthonous resources. Here, we evaluated the importance of allochthonous resources (litterfall) for the aquatic food webs in Neotropical tank bromeliads, a naturally replicated aquatic microcosm. Aquatic invertebrates were sampled in more than 100 bromeliads within either open or shaded habitats and within five geographically distinct sites located in four different countries. Using stable isotope analyses, we determined that allochthonous sources comprised 74% (±17%) of the food resources of aquatic invertebrates. However, the allochthonous contribution to aquatic invertebrates strongly decreased from shaded to open habitats, as light incidence increased in the tanks. The density of detritus in the tanks had no impact on the importance of allochthonous sources to aquatic invertebrates. This overall pattern held for all invertebrates, irrespective of the taxonomic or functional group to which they belonged. We concluded that, over a broad geographic range, aquatic food webs of tank bromeliads are mostly allochthonous-based, but the relative importance of allochthonous subsidies decreases when light incidence favors autochthonous primary production. These results suggest that, for other freshwater systems, some of the between-study variation in the importance of allochthonous subsidies may similarly be driven by the relative availability of autochthonous resources.
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Affiliation(s)
- Vinicius F Farjalla
- Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Ilha do Fundão, PO Box 68020, Rio de Janeiro - RJ, Brazil
| | - Angélica L González
- Department of Zoology & Biodiversity Research Centre, University of British Columbia, 6270 University Blvd., Vancouver, British Columbia, V6T 1Z4, Canada.,Biology Department and Center for Computational and Integrative Biology, Rutgers, The State University of NJ, Camden, New Jersey, 08103, USA
| | - Régis Céréghino
- Ecolab (UMR-CNRS 5245), Université de Toulouse, 118 route de Narbonne, 31062, Toulouse, France
| | - Olivier Dézerald
- CNRS, Ecologie des Forêts de Guyane (UMR-CNRS 8172), Campus Agronomique, F-97379, Kourou Cedex, France
| | - Nicholas A C Marino
- Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Ilha do Fundão, PO Box 68020, Rio de Janeiro - RJ, Brazil
| | - Gustavo C O Piccoli
- Graduate Program in Animal Biology, IBILCE, State University of São Paulo (UNESP), São José do Rio Preto-SP, Brazil
| | - Barbara A Richardson
- 165 Braid Road, Edinburgh, EH10 6JE, UK.,Luquillo LTER, Institute for Tropical Ecosystem Studies, College of Natural Sciences, University of Puerto Rico at Rio Piedras, P.O. Box 70377, San Juan, Puerto Rico, 00936-8377, USA
| | - Michael J Richardson
- 165 Braid Road, Edinburgh, EH10 6JE, UK.,Luquillo LTER, Institute for Tropical Ecosystem Studies, College of Natural Sciences, University of Puerto Rico at Rio Piedras, P.O. Box 70377, San Juan, Puerto Rico, 00936-8377, USA
| | - Gustavo Q Romero
- Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), PO Box 6109, Campinas-SP, CEP 13083-970, Brazil
| | - Diane S Srivastava
- Department of Zoology & Biodiversity Research Centre, University of British Columbia, 6270 University Blvd., Vancouver, British Columbia, V6T 1Z4, Canada
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Du B, Haddad SP, Luek A, Scott WC, Saari GN, Kristofco LA, Connors KA, Rash C, Rasmussen JB, Chambliss CK, Brooks BW. Bioaccumulation and trophic dilution of human pharmaceuticals across trophic positions of an effluent-dependent wadeable stream. Philos Trans R Soc Lond B Biol Sci 2015; 369:rstb.2014.0058. [PMID: 25313153 DOI: 10.1098/rstb.2014.0058] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Though pharmaceuticals are increasingly observed in a variety of organisms from coastal and inland aquatic systems, trophic transfer of pharmaceuticals in aquatic food webs have not been reported. In this study, bioaccumulation of select pharmaceuticals was investigated in a lower order effluent-dependent stream in central Texas, USA, using isotope dilution liquid chromatography-tandem mass spectrometry (MS). A fish plasma model, initially developed from laboratory studies, was tested to examine observed versus predicted internal dose of select pharmaceuticals. Pharmaceuticals accumulated to higher concentrations in invertebrates relative to fish; elevated concentrations of the antidepressant sertraline and its primary metabolite desmethylsertraline were observed in the Asian clam, Corbicula fluminea, and two unionid mussel species. Trophic positions were determined from stable isotopes (δ(15)N and δ(13)C) collected by isotope ratio-MS; a Bayesian mixing model was then used to estimate diet contributions towards top fish predators. Because diphenhydramine and carbamazepine were the only target compounds detected in all species examined, trophic magnification factors (TMFs) were derived to evaluate potential trophic transfer of both compounds. TMFs for diphenhydramine (0.38) and carbamazepine (1.17) indicated neither compound experienced trophic magnification, which suggests that inhalational and not dietary exposure represented the primary route of uptake by fish in this effluent-dependent stream.
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Affiliation(s)
- Bowen Du
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA
| | - Samuel P Haddad
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA
| | - Andreas Luek
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4
| | - W Casan Scott
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA
| | - Gavin N Saari
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA
| | - Lauren A Kristofco
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA
| | - Kristin A Connors
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA Institute of Biomedical Studies, Baylor University, Waco, TX 76798, USA
| | - Christopher Rash
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA
| | - Joseph B Rasmussen
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada T1K 3M4
| | - C Kevin Chambliss
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA
| | - Bryan W Brooks
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA The Institute of Ecological, Earth and Environmental Sciences, Baylor University, Waco, TX 76798, USA Institute of Biomedical Studies, Baylor University, Waco, TX 76798, USA
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Abstract
More than 50% of the world's population lives in urban centers. As collection basins for landscape activity, urban waters are an interface between human activity and the natural environment. The microbiome of urban waters could provide insight into the impacts of pollution, the presence of human health risks, or the potential for long-term consequences for these ecosystems and the people who depend upon them. An integral part of the urban water cycle is sewer infrastructure. Thousands of miles of pipes line cities as part of wastewater and stormwater systems. As stormwater and sewage are released into natural waterways, traces of human and animal microbiomes reflect the sources and magnitude of fecal pollution and indicate the presence of pollutants, such as nutrients, pathogens, and chemicals. Non-fecal organisms are also released as part of these systems. Runoff from impervious surfaces delivers microbes from soils, plants and the built environment to stormwater systems. Further, urban sewer infrastructure contains its own unique microbial community seemingly adapted to this relatively new artificial habitat. High microbial densities are conveyed via pipes to waterways, and these organisms can be found as an urban microbial signature imprinted on the natural community of rivers and urban coastal waters. The potential consequences of mass releases of non-indigenous microorganisms into natural waters include creation of reservoirs for emerging human pathogens, altered nutrient flows into aquatic food webs, and increased genetic exchange between two distinct gene pools. This review highlights the recent characterization of the microbiome of urban sewer and stormwater infrastructure and its connection to and potential impact upon freshwater systems.
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Affiliation(s)
- Sandra L. McLellan
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Jenny C. Fisher
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Ryan J. Newton
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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Sintes E, Del Giorgio PA. Feedbacks between protistan single-cell activity and bacterial physiological structure reinforce the predator/prey link in microbial foodwebs. Front Microbiol 2014; 5:453. [PMID: 25250018 PMCID: PMC4155813 DOI: 10.3389/fmicb.2014.00453] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 08/11/2014] [Indexed: 11/21/2022] Open
Abstract
The trophic interactions between bacteria and their main predators, the heterotrophic nanoflagellates (HNFs), play a key role in the structuring and functioning of aquatic microbial food webs. Grazing regulation of bacterial communities, both of biomass and community structure, have been frequently reported. Additionally, bottom-up responses of the HNF at the population level (numerical responses) have also been extensively described. However, the functional response of HNF at the single-cell level has not been well explored. In this study, we concurrently measured the physiological structure of bacterial communities and HNF single-cell activities during re-growth cultures of natural aquatic communities. We found that changes in the abundance and proportion of the preferred, highly active bacterial prey, caused by the feeding activity of their predators (HNF), induced a negative feedback effect on the single-cell activity of these HNF. These shifts in the specific cellular activity of HNF occur at a much shorter time scale than population level shifts in flagellate abundance, and offer a complementary mechanism to explain not only the tight coupling between bacteria and HNF, but also the relative constancy of bacterial abundance in aquatic ecosystems.
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Affiliation(s)
- Eva Sintes
- Department of Limnology and Oceanography, University of Vienna Vienna, Austria
| | - Paul A Del Giorgio
- Département des Sciences Biologiques, Université du Québec à Montréal Montréal, QC, Canada
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Abstract
Periphyton communities have received relatively little attention in lake ecosystems. However, evidence is increasing that they play a key role in primary productivity, nutrient cycling, and food web interactions. This review summarizes those findings and places them in a conceptual framework to evaluate the functional importance of periphyton in lakes. The role of periphyton is conceptualized based on a spatial hierarchy. At the coarsest scale, landscape properties such as lake morphometry, influence the amount of available habitat for periphyton growth. Watershed-related properties, such as loading of dissolved organic matter, nutrients, and sediments influence light availability and hence periphyton productivity. At the finer scale of within the lake, both habitat availability and habitat type affect periphyton growth and abundance. In addition, periphyton and phytoplankton compete for available resources at the within-lake scale. Our review indicates that periphyton plays an important functional role in lake nutrient cycles and food webs, especially under such conditions as relatively shallow depths, nutrient-poor conditions, or high water-column transparency. We recommend more studies assessing periphyton function across a spectrum of lake morphometry and trophic conditions.
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Affiliation(s)
- Yvonne Vadeboncoeur
- Department of Biology, McGill University, 1205 Avenue Docteur Penfield, Montreal, Quebec H3A 1B1, Canada.
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