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Differential impact of severe drought on infant mortality in two sympatric neotropical primates

Campos, FA, Kalbitzer, U, Melin, AD, Hogan, JD, Cheves, SE, Murillo-Chacons, E, Guadamuz, A, Myers, MS, Schaffner, CM, Jack, KM, Aureli, F and Fedigan, LM (2020) Differential impact of severe drought on infant mortality in two sympatric neotropical primates. Royal Society Open Science, 7 (4). ISSN 2054-5703

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Abstract

Extreme climate events can have important consequences for the dynamics of natural populations, and severe droughts are predicted to become more common and intense due to climate change. We analysed infant mortality in relation to drought in two primate species (white-faced capuchins, Cebus capucinus imitator, and Geoffroy's spider monkeys, Ateles geoffroyi) in a tropical dry forest in northwestern Costa Rica. Our survival analyses combine several rare and valuable long-term datasets, including long-term primate life-history, landscape-scale fruit abundance, food-tree mortality, and climate conditions. Infant capuchins showed a threshold mortality response to drought, with exceptionally high mortality during a period of intense drought, but not during periods of moderate water shortage. By contrast, spider monkey females stopped reproducing during severe drought, and the mortality of infant spider monkeys peaked later during a period of low fruit abundance and high food-tree mortality linked to the drought. These divergent patterns implicate differing physiology, behaviour or associated factors in shaping species-specific drought responses. Our findings link predictions about the Earth's changing climate to environmental influences on primate mortality risk and thereby improve our understanding of how the increasing severity and frequency of droughts will affect the dynamics and conservation of wild primates.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Multidisciplinary Sciences; Science & Technology - Other Topics; climate change; tropical dry forest; Cebus capucinus imitator; Ateles geoffroyi; Costa Rica; demography; CAPUCHINS CEBUS-CAPUCINUS; TROPICAL DRY FOREST; SANTA-ROSA; GROUP-SIZE; CLIMATE; POPULATIONS; WILD; VULNERABILITY; SEASONALITY; RESPONSES
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QH Natural history
Q Science > QL Zoology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: The Royal Society
Related URLs:
Date Deposited: 12 May 2020 08:44
Last Modified: 12 May 2020 08:45
DOI or Identification number: 10.1098/rsos.200302
URI: http://researchonline.ljmu.ac.uk/id/eprint/12925

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