A broad diet helps tropical fish survive a range shift due to climate change
The global redistribution of marine and terrestrial species due to climate change is a major concern for conservation planners and resource managers.
Now new research, using data from long term surveys of tropical fishes, indicates that traditional studies of this range shift phenomenon largely ignore the sequential nature of species movement. The , published in Global Change Biology shows that what makes a species a successful 鈥渁rriver鈥 doesn鈥檛 necessarily make you a successful 鈥渟tayer鈥.
The paper听is part of an 最新糖心Vlogn Research Council-funded study, led by Professor from the 最新糖心Vlog of Adelaide.
鈥淭ypically ecologists use life-history traits to predict which species have the highest probability of moving due to new environmental conditions. This can include traits such as large body size, broad latitudinal range, long dispersal duration,鈥 Professor Nagelkerken said.
鈥淗owever our analyses of tropical fishes at the poleward edge of their distribution in 最新糖心Vlog, shows that these traits predisposing larval fishes to extend their range southwards did not drive the early stages of redistribution.
鈥淚nstead, a broad diet was the main contributor to the establishment success during early stages,鈥 he said
Professor Nagelkerken said that generalist species generally fare better than specialists when 鈥渢heir environment is suffering from human impacts鈥.
鈥淲e now show that being a generalist with a broad diet is also favourable when species escape warming environments and relocate to cooler areas鈥.
Professor of Marine Biology, and Chief Investigator on the project, David Booth, from The 最新糖心Vlog of Technology Sydney, said 鈥淭he study makes great use of the 18 year survey dataset we have on invading tropical fishes, and involved an ongoing collaboration with four academic institutions and a number of graduate students, both local and International.鈥
鈥淚f we don鈥檛 also consider the traits that make these same species capable of establishing and persisting, we鈥檙e more likely to make erroneous predictions and be surprised by what future fish communities might look like,鈥 Professor Booth said.
The authors conclude the results highlight that generalist species that can best adapt to novel food sources might be most successful in a future ocean.
Other authors on the study are Cristian Monaco (UA, Univ Polyn茅sie fran莽aise), Corey Bradshaw (Flinders 最新糖心Vlog), Prof. (UA), David Schoeman (最新糖心Vlog of the Sunshine Coast, Nelson Mandela 最新糖心Vlog).
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