Potential direct and indirect effects of climate change on a shallow natural lake fish assemblage
| Autor: | David W. Willis, Jason J. Breeggemann, Tanner M. Stevens, Jacob R. Krause, Mark A. Kaemingk, Steven R. Chipps, Craig P. Paukert, Alexander P. Letvin, Timothy J. DeBates |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Perch Biomass (ecology) food.ingredient Ecology biology 010604 marine biology & hydrobiology Growing season Micropterus Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Predation Fishery Bass (fish) food computer Ecology Evolution Behavior and Systematics Esox Pike computer.programming_language |
| Zdroj: | Ecology of Freshwater Fish. 25:487-499 |
| ISSN: | 0906-6691 |
| DOI: | 10.1111/eff.12248 |
| Popis: | Much uncertainty exists around how fish communities in shallow lakes will respond to climate change. In this study, we modelled the effects of increased water temperatures on consumption and growth rates of two piscivores (northern pike [Esox lucius] and largemouth bass [Micropterus salmoides]) and examined relative effects of consumption by these predators on two prey species (bluegill [Lepomis macrochirus] and yellow perch [Perca flavescens]). Bioenergetics models were used to simulate the effects of climate change on growth and food consumption using predicted 2040 and 2060 temperatures in a shallow Nebraska Sandhill lake, USA. The patterns and magnitude of daily and cumulative consumption during the growing season (April–October) were generally similar between the two predators. However, growth of northern pike was always reduced (−3 to −45% change) compared to largemouth bass that experienced subtle changes (4 to −6% change) in weight by the end of the growing season. Assuming similar population size structure and numbers of predators in 2040–2060, future consumption of bluegill and yellow perch by northern pike and largemouth bass will likely increase (range: 3–24%), necessitating greater prey biomass to meet future energy demands. The timing of increased predator consumption will likely shift towards spring and fall (compared to summer), when prey species may not be available in the quantities required. Our findings suggest that increased water temperatures may affect species at the edge of their native range (i.e. northern pike) and a potential mismatch between predator and prey could exist. |
| Databáze: | OpenAIRE |
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