Life history diversity in terrestrial animals is associated with metabolic response to seasonally fluctuating resources.

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Date: Mar. 2022
From: Ecography(Vol. 2022, Issue 3)
Publisher: John Wiley & Sons, Inc.
Document Type: Brief article
Length: 198 words

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Abstract :

Physiological and behavioral processes interact with environmental conditions to strongly influence organismal life history strategies which covary with latitude. However, few studies have articulated explicit linkages between metabolism and life history across latitudinal gradients. Interactions between metabolism and resource dynamics may give rise not only to patterns of variation in mean life history traits, but also to patterns in the ranges (diversity) of those traits across the same gradients. Here we show that the range of viable and realized metabolic/life history strategies covaries with the amplitude of seasonal resource fluctuations and, thus, latitude. Using a theoretical metabolic model we predicted that aseasonal environments support a greater diversity of life-history strategies than those subject to strong seasonality, where only 'fast' strategies were successful. We analyzed a global database of organismal metabolic parameters (estimated using a standard dynamic energy budget model) and found empirically derived evidence supporting our theoretical prediction that life history diversity negatively covaries with resource seasonality. These results comprise a novel framework for exploring covariation of life history with latitude at global scales, which may in turn help to explain other fundamental ecological patterns such as species diversity across gradients of seasonality. CAPTION(S): Supplementary Material Supplementary Material

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Gale Document Number: GALE|A695401790