• Energy Research

AbstractIntraspecific variation in genotypically determined traits can influence ecosystem processes. Therefore, the impact of climate change on ecosystems may depend, in part, on the distribution of plant genotypes. Here we experimentally assess effects of climate warming and excess nitrogen supply on litter decomposition using 12 genotypes of a cosmopolitan foundation species collected across a 2100 km latitudinal gradient and grown in a common garden. Genotypically determined litter‐chemistry traits varied substantially within and among geographic regions, which strongly affected decomposition and the magnitude of warming effects, as warming accelerated litter mass loss of high‐nutrient, but not low‐nutrient, genotypes. Although increased nitrogen supply alone had no effect on decomposition, it strongly accelerated litter mass loss of all genotypes when combined with warming. Rates of microbial respiration associated with the leaf litter showed nearly identical responses as litter mass loss. These results highlight the importance of interactive effects of environmental factors and suggest that loss or gain of genetic variation associated with key phenotypic traits can buffer, or exacerbate, the impact of global change on ecosystem process rates in the future.

AbstractSmaller invertebrate body mass is claimed to be a universal response to climate warming. It has been suggested that body mass could also predict consumer influences on ecosystem processes in a warmer world because generalized rules describe relationships between body mass, temperature, and metabolism. However, the utility of this suggestion remains tenuous because the nutritional and physiological constraints underlying relationships between body mass and consumer‐driven processes are highly variable in realistic settings. Here we test, using a generalist invertebrate detritivore, fungi, and leaf litter, the limitations imposed by nutrition on growth and decomposition in response to global change. Strong competition for fungal food resources limited invertebrate growth and reduced body mass plasticity in response to warming and nitrogen pollution scenarios. When competition was relaxed by experimentally reducing invertebrate density, consumption of fungi promoted rapid invertebrate growth and enhanced invertebrate sensitivity to the global change scenarios, especially warming and nitrogen pollution together. Accordingly, fungi promoted invertebrate body mass plasticity and mediated consumer effects on decomposition causing the relative influence of warming and nitrogen pollution to vary across trophic levels. An important implication is that managing nitrogen pollution may alter which trophic level is most sensitive to warming.

CTD, Meteo, nutrient chemistry and Aquascope camera data, used to predict Chl-a as part of Gabriel Vallat civil service project.There is a data set with daily averages and one with hourly measurements. In each dataset a single average value was calculated across the photic zone (0-8m) for each profile, and zooplankton and phytoplankton cluster abundances were estimated using machine learning classifier output of Aquascope camera data (more information about aquascope see https://doi.org/10.1016/j.watres.2021.117524 https://doi.org/10.25678/0004BW)

Meteo data from the monitoring platform in Greifensee, Switzerland. There are three datasets: 2011 - 2018, 2019 - 11.12.2020, and 11.12.2020 - 2021. Note that the meteo station was upgraded on 11.12.2020. The data has been cleaned and a summary per hour is included for easier use.