J. Classen results 28
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Plant Functional Traits and Vegetation Structure Explain Pollination Networks at ScaleNARA Subscribed
Quantifying biotic interactions at scale is critical to understanding ecosystem functions, such as plant‐pollinator interactions. Here, we demonstrate how woody plant functional traits and vegetation structure gathered with remote sensing can aid in predicting plant‐pollinator network indices from fine to broad spatial extents. We analysed 209 tropical plant‐pollinator networks, where vegetation characteristics were generated...
Gains in soil carbon storage under anthropogenic nitrogen deposition are rapidly lost following its cessationNARA Subscribed
In the Northern Hemisphere, anthropogenic nitrogen (N) deposition contributed to the enhancement of the global terrestrial carbon (C) sink, partially offsetting CO 2 emissions. Across several long‐term field experiments, this ecosystem‐level response was determined to be driven, in part, by the suppression of microbial activity associated with the breakdown of soil organic matter. However, since the implementation of emission...
The influence of aboveground and belowground species composition on spatial turnover in nutrient pools in alpine grasslandsNARA Subscribed
Aim An important research question in ecology is how climate and the biodiversity of aboveground plants and belowground microbiomes affect ecosystem functions such as nutrient pools. However, little is studied on the concurrent role of above‐ and belowground species composition in shaping the spatial distribution patterns of ecosystem functions across environmental gradients. Here, we investigated the relationships between the...
Seventy five percent of the world's food crops benefit from insect pollination. Hence, there has been increased interest in how global change drivers impact this critical ecosystem service. Because standardized data on crop pollination are rarely available, we are limited in our capacity to understand the variation in pollination benefits to crop yield, as well as to anticipate changes in this service, develop predictions, and...
Plant removal across an elevational gradient marginally reduces rates, substantially reduces variation in mineralizationNARA Subscribed
The loss of aboveground plant diversity alters belowground ecosystem function; yet, the mechanisms underpinning this relationship and the degree to which plant community structure and climate mediate the effects of plant species loss remain unclear. Here, we explored how plant species loss through experimental removal shaped belowground function in ecosystems characterized by different climatic regimes and edaphic properties....
In human glandular endometrial epithelial cells, desmosomal and adherens junction proteins have been shown to extend from a subapically restricted lateral position to the entire lateral membrane during the implantation window of the menstrual cycle. Similarly, a menstrual cycle stage-dependent redistribution of the extracellular matrix adhesion protein α6-integrin has been reported. These changes are believed to be important f...
Alpine grassland plants grow earlier and faster but biomass remains unchanged over 35 years of climate changeNARA Subscribed
Satellite data indicate significant advancement in alpine spring phenology over decades of climate warming, but corresponding field evidence is scarce. It is also unknown whether this advancement results from an earlier shift of phenological events, or enhancement of plant growth under unchanged phenological pattern. By analyzing a 35‐year dataset of seasonal biomass dynamics of a Tibetan alpine grassland, we show that climate...
Consistently inconsistent drivers of microbial diversity and abundance at macroecological scalesNARA Subscribed
Macroecology seeks to understand broad‐scale patterns in the diversity and abundance of organisms, but macroecologists typically study aboveground macroorganisms. Belowground organisms regulate numerous ecosystem functions, yet we lack understanding of what drives their diversity. Here, we examine the controls on belowground diversity along latitudinal and elevational gradients. We performed a global meta‐analysis of 325 soil...
Ecosystems containing multiple nonnative plant species are common, but mechanisms promoting their co‐occurrence are understudied. Plant–soil interactions contribute to the dominance of singleton species in nonnative ranges because many nonnatives experience stronger positive feedbacks relative to co‐occurring natives. Plant–soil interactions could impede other nonnatives if an individual nonnative benefits from its soil commun...
Temperature versus resource constraints: which factors determine bee diversity on M ount K ilimanjaro, T anzania?NARA Subscribed
Aim Understanding the mechanisms controlling variation in species richness along environmental gradients is one of the most important objectives in ecology. Resource availability is often considered as the major driver of animal diversity. However, in ectotherms, temperature might play a predominant role as it modulates metabolic rates and the access of animals to resources. Here, we investigate the relative importance of reso...
Net mineralization of N at deeper soil depths as a potential mechanism for sustained forest production under elevated [CO 2 ]NARA Subscribed
Elevated atmospheric carbon dioxide concentrations [CO 2 ] is projected to increase forest production, which could increase ecosystem carbon (C) storage. This study contributes to our broad goal of understanding the causes and consequences of increased fine‐root production and mortality under elevated [CO 2 ] by examining potential gross nitrogen (N) cycling rates throughout the soil profile. Our study was conducted in a CO 2...
Coordinated approaches to quantify long‐term ecosystem dynamics in response to global changeNARA Subscribed
Many serious ecosystem consequences of climate change will take decades or even centuries to emerge. Long‐term ecological responses to global change are strongly regulated by slow processes, such as changes in species composition, carbon dynamics in soil and by long‐lived plants, and accumulation of nutrient capitals. Understanding and predicting these processes require experiments on decadal time scales. But decadal experimen...
Climate change effects on plant biomass alter dominance patterns and community evenness in an experimental old‐field ecosystemNARA Subscribed
Atmospheric and climatic change can alter plant biomass production and plant community composition. However, we know little about how climate change‐induced alterations in biomass production affect plant species composition. To better understand how climate change will alter both individual plant species and community biomass, we manipulated atmospheric [CO 2 ], air temperature, and precipitation in a constructed old‐field eco...