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Intense nocturnal warming alters growth strategies, colouration and parasite load in a diurnal lizard

Abstract : High species diversity is generally thought to be a requirement for sustaining forest multifunctionality. However, the degree to which the relationship between species-, structural-, and trait-diversity of forests and multifunctionality depend on the context (such as stand age or abiotic conditions) is not well studied. Here, we hypothesized that context-dependency of tree species diversity, functional trait composition and stand structural attributes promote temperate forest multifunctionality including above- and below-ground multiple and single functions. To do so, we used repeated forest inventory data, from temperate mixed forests of northeast China, to quantify two above-ground (i.e. coarse woody productivity and wild edible plant biomass), five below-ground (i.e. soil organic carbon, total soil nitrogen, potassium, phosphorus and sulfur) functions, tree species diversity, individual tree size variation (CVDBH) and functional trait composition of specific leaf area (CWMSLA) as well as stand age and abiotic conditions. We found that tree species diversity increased forest multifunctionality and most of the single functions. Below-ground single and multifunctionality were better explained by tree species diversity. In contrast, above-ground single and multifunctionality were better explained by CVDBH. However, CWMSLA was also an additional important driver for maintaining above- and below-ground forest multifunctionality through opposing plant functional strategies. Stand age markedly reduced forest multifunctionality, tree species diversity and CWMSLA but substantially increased CVDBH. Below-ground forest multifunctionality and tree species diversity decreased while above-ground forest multifunctionality increased on steep slopes. These results highlight that context-dependency of forest diversity attributes might regulate forest multifunctionality but may not have a consistent effect on above-ground and below-ground forest multifunctionality due to the fact that those functions were driven by varied functional strategies of different plant species. We argue that maximizing forest complexity could act as a viable strategy to maximizing forest multifunctionality, while also promoting biodiversity conservation to mitigate climate change effects.
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https://hal-cnrs.archives-ouvertes.fr/hal-03377530
Contributor : Jean-François Le Galliard Connect in order to contact the contributor
Submitted on : Thursday, October 14, 2021 - 11:23:14 AM
Last modification on : Tuesday, September 6, 2022 - 3:40:23 AM
Long-term archiving on: : Saturday, January 15, 2022 - 6:36:11 PM

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Alexis Rutschmann, Andréaz Dupoué, Donald Miles, Rodrigo Megía‐palma, Clémence Lauden, et al.. Intense nocturnal warming alters growth strategies, colouration and parasite load in a diurnal lizard. Journal of Animal Ecology, Wiley, 2021, 90 (8), pp.1864-1877. ⟨10.1111/1365-2656.13502⟩. ⟨hal-03377530⟩

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