GLOBAL WARMING EFFECTS ON ECTOTHERM SPECIES
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Date
2024-05-26
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Universiti Malaysia Terengganu
Abstract
In light of ongoing climate change, it is increasingly important to know how
nutritional requirements of ectotherms are affected by changing temperatures.
Here, we analyse the wide thermal response of phosphorus (P) requirements
via elemental gross growth efficiencies of Carbon (C) and P, and the Threshold
Elemental Ratios in different aquatic invertebrate ectotherms: the freshwater
model species Daphnia magna, the marine copepod Acartia tonsa, the marine
heterotrophic dinoflagellate Oxyrrhis marina, and larvae of two populations of
the marine crab Carcinus maenas. We show that they all share a non-linear cubic
thermal response of nutrient requirements. Phosphorus requirements decrease
from low to intermediate temperatures, increase at higher temperatures and
decrease again when temperature is excessive. This common thermal response
of nutrient requirements is of great importance if we aim to understand or even
predict how ectotherm communities will react to global warming and nutrientdriven eutrophication.
Description
Keywords
carbon, ecological stoichiometry, gross growth efficiency, growth, metabolism, nutrients, phosphorus, respiration, thermal gradient, threshold elemental ratio