@misc{10481/50934,
year = {2017},
month = {8},
url = {http://hdl.handle.net/10481/50934},
abstract = {Recent anthropogenic climate change and the exponential increase over the past
few decades of Saharan dust deposition, containing ecologically important inputs of
phosphorus (P) and calcium (Ca), are potentially affecting remote aquatic ecosystems.
In this study, we examine changes in cladoceran assemblage composition and
chlorophyll-a concentrations over the past ~150 years from high-resolution, welldated
sediment cores retrieved from six remote high mountain lakes in the Sierra
Nevada Mountains of Southern Spain, a region affected by Saharan dust deposition.
In each lake, marked shifts in cladoceran assemblages and chlorophyll-a concentrations
in recent decades indicate a regional-scale response to climate and Saharan
dust deposition. Chlorophyll-a concentrations have increased since the 1970s, consistent
with a response to rising air temperatures and the intensification of atmospheric
deposition of Saharan P. Similar shifts in cladoceran taxa across lakes began
over a century ago, but have intensified over the past ~50 years, concurrent with
trends in regional air temperature, precipitation, and increased Saharan dust deposition.
An abrupt increase in the relative abundance of the benthic cladoceran Alona
quadrangularis at the expense of Chydorus sphaericus, and a significant increase in
Daphnia pulex gr. was a common trend in these softwater lakes. Differences in the
magnitude and timing of these changes are likely due to catchment and lake-specific
differences. In contrast with other alpine lakes that are often affected by acid
deposition, atmospheric Ca deposition appears to be a significant explanatory factor,
among others, for the changes in the lake biota of Sierra Nevada that has not been
previously considered. The effects observed in Sierra Nevada are likely occurring in
other Mediterranean lake districts, especially in softwater, oligotrophic lakes. The
predicted increases in global temperature and Saharan dust deposition in the future
will further impact the ecological condition of these ecosystems},
organization = {Ministerio de Educación y Ciencia (MEC), Grant/Award Number: AP2007-00352; Programa Nacional de Movilidad de Recursos Humanos de Investigaci on (MICINN); Ministerio de Medio Ambiente (MMA), Grant/Award Number: 87/2007; Ministerio de Econom ıa, Industria y Competitividad (MINECO), Grant/Award Number: CGL2011-23483; Natural Sciences and Engineering Research Council of Canada},
publisher = {Wiley},
keywords = {Chlorophyll-a},
keywords = {Cladocera},
keywords = {Daphnia},
keywords = {High mountain lakes},
keywords = {Saharan dust},
keywords = {Sierra Nevada},
keywords = {Warming},
title = {Climate change and Saharan dust drive recent cladoceran and primary production changes in remote alpine lakes of Sierra Nevada, Spain},
doi = {DOI: 10.1111/gcb.13878},
author = {Jiménez, Laura and Rühland, Kathleen M. and Jeziorski, Adam and Smol, John P. and Pérez Martínez, María del Carmen},
}