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Ecology

Title:		Mangrove microclimates alter seedling dynamics at the range edge
Author(s):		Devaney JL; Lehmann M; Feller IC; Parker JD;
Address:		"Smithsonian Environmental Research Center, Smithsonian Institution, Edgewater, Maryland, 21037, USA. Tyson Research Center, Department of Biology, Washington University in St. Louis, Saint Louis, Missouri, 63130, USA"
Journal Title:		Ecology
Year:		2017
Volume:		98
Issue:		10
Page Number:		2513 - 2520
DOI:		10.1002/ecy.1979
ISSN/ISBN:		0012-9658 (Print) 0012-9658 (Linking)
Abstract:		"Recent climate warming has led to asynchronous species migrations, with major consequences for ecosystems worldwide. In woody communities, localized microclimates have the potential to create feedback mechanisms that can alter the rate of species range shifts attributed to macroclimate drivers alone. Mangrove encroachment into saltmarsh in many areas is driven by a reduction in freeze events, and this encroachment can further modify local climate, but the subsequent impacts on mangrove seedling dynamics are unknown. We monitored microclimate conditions beneath mangrove canopies and adjacent open saltmarsh at a freeze-sensitive mangrove-saltmarsh ecotone and assessed survival of experimentally transplanted mangrove seedlings. Mangrove canopies buffered night time cooling during the winter, leading to interspecific differences in freeze damage on mangrove seedlings. However, mangrove canopies also altered biotic interactions. Herbivore damage was higher under canopies, leading to greater mangrove seedling mortality beneath canopies relative to saltmarsh. While warming-induced expansion of mangroves can lead to positive microclimate feedbacks, simultaneous fluctuations in biotic drivers can also alter seedling dynamics. Thus, climate change can drive divergent feedback mechanisms through both abiotic and biotic channels, highlighting the importance of vegetation-microclimate interactions as important moderators of climate driven range shifts"
Keywords:		*Avicennia Climate Change *Microclimate Rhizophoraceae *Seedlings *Wetlands Avicennia germinans Laguncularia racemosa Rhizophora mangle coastal wetlands mangrove range expansion saltmarsh species migration winter climate change;
Notes:		"MedlineDevaney, John L Lehmann, Michael Feller, Ilka C Parker, John D eng 2017/08/06 Ecology. 2017 Oct; 98(10):2513-2520. doi: 10.1002/ecy.1979"