Water availability rather than temperature control soil fauna community structure and prey-predator interactions

Adriane Aupic-Samain, Virginie Baldy, Ninon Delcourt, Paul Henning Krogh, Thierry Gauquelin, Catherine Fernandez, Mathieu Santonja With the ongoing climate change, soil biodiversity could be strongly impacted with major consequences for ecosystem processes. Among soil biodiversity, detritivores such as Collembola (springtails) play a major role in plant litter decomposition. Thus, it is of prime interest to improve our knowledge of the impact of climate change (i.e. … Continue reading Water availability rather than temperature control soil fauna community structure and prey-predator interactions

Orthoimages of one of the investigated areas in Catalonia (NE Spain) where recent forest establishment following pastureland abandonment was observed. Top left image refer to 1956 whereas top right image is from 2005 and it clearly shows patches of forests recently established. Image at the bottom shows one of the studied recent forests.

Land-use legacies affect tree ecophysiology and nitrogen availability in secondary beech forests in Mediterranean mountainous areas

Guerrieri, Rossella; Correia, Marta; Martin-Fores, Irene; Alfaro-Sanchez, Raquel; Pino, Joan; Hampe, Arndt; Valladares, F.; Espelta, Josep Greening of our planet has increased over recent decades. This has been attributed mostly to the CO2 fertilization effect on vegetation (particularly forests) though recent studies have highlighted the crucial role of land-use change. Indeed, abandonment of past agricultural and pastureland (in previously deforested areas or marginal mountainous regions) … Continue reading Land-use legacies affect tree ecophysiology and nitrogen availability in secondary beech forests in Mediterranean mountainous areas

Experimental set-up (from left to right, from top to bottom) alder trees grown in alder, birch and Douglas fir soil cores, roots from one soil core, experimental core design with two membranes to measure ion exchange and root exclusion cores, and mesocosms being 13CO2 labelled in a chamber.

Nutrient exchange between tree and soil symbionts determine performance feedback in Alder

Ardanuy, Agnès; Walker, Jennifer; Kritzler, Ully; Taylor, Andy; Johnson, David How do plants influence the soil environment in which they grow? Tackling this question has led to the concept of ‘plant-soil feedback’, which describes reciprocal interactions between plants and their soil environment, leading to either positive or negative effects on plant performance. While we know that soil biota can have direct effects on plant nutrition … Continue reading Nutrient exchange between tree and soil symbionts determine performance feedback in Alder

Lake in Brazil

Multiple trophic groups regulate the functioning of tropical shallow lakes

Moi, D; Romero, Gustavo Q.; Antiqueira, Pablo; Mormul, Roger Paulo; Teixeira de Mello, Franco; Bonecker, Claudia Human activities influence virtually all ecosystems around the globe, which has caused loss of trophic groups (trophic groups are defined as group of organisms within an ecosystem that occupy the same level in a food web) of the ecosystems in intensity never before recorded. Despite this, the importance of … Continue reading Multiple trophic groups regulate the functioning of tropical shallow lakes

The significance of biocrusts to soil multifunctionality is related to aridity

Yan‐gui Su, Jie Liu, Yuan‐ming Zhang, Gang Huang Biocrusts (composed of bryophytes, lichens, cyanobacteria and algae) provide important cover on the soil surface in drylands, improve soil health, and provide key ecosystem functions and services. Drylands are globally extensive, supporting up to 38% of the human population, and thus can vary substantially in physical and biotic characteristics, including the development of biocrusts. We lack understanding … Continue reading The significance of biocrusts to soil multifunctionality is related to aridity

Do grassland ecosystems have memory of previous-year precipitation?

Han, Juanjuan; Chen, Jiquan; Shi, Weiyu; Song, Jian; Hui, Dafeng; Ru, Jingyi; Wan, Shiqiang Climate models project that temperature will increase by 1.1 to 5.4°C by 2100. Extreme precipitation events including severe droughts are likely to increase in some regions of the world, especially in semi-arid grasslands. However, how the current year and previous years’ precipitation will influence grassland ecosystems remain unclear. Precipitation could influence … Continue reading Do grassland ecosystems have memory of previous-year precipitation?

Predicting tree community composition and forest productivity under climate change

Morin, Xavier; De Coligny, François; Martin-StPaul, Nicolas; Bugmann, Harald; Cailleret, Maxime; Limousin, Jean-Marc; Ourcival, Jean-Marc; Prévosto, Bernard; Simioni, Guillaume; Toigo, Maude; Vennetier, Michel; Cateau, Eugénie; Guillemot, Joannes Climate change impacts forests in many ways. It notably alters forest functioning and especially productivity, on which depends the capacity of forests to sequester carbon and provide services to human populations. It also affects the species composition of … Continue reading Predicting tree community composition and forest productivity under climate change

A lake with a diverse range of plant species

Multiple trophic groups regulate the functioning of tropical shallow lakes

Moi, D; Romero, Gustavo Q.; Antiqueira, Pablo; Mormul, Roger Paulo; Teixeira de Mello, Franco; Bonecker, Claudia Human activities influence virtually all ecosystems around the globe, which has caused loss of trophic groups (trophic groups are defined as group of organisms within an ecosystem that occupy the same level in a food web) of the ecosystems in intensity never before recorded. Despite this, the importance of … Continue reading Multiple trophic groups regulate the functioning of tropical shallow lakes

Predation has higher effects on traits of introduced prey at lower than higher latitudes

Diana P. López, Amy L. Freestone Predation is expected to increase in strength towards tropical regions.  While studies show predation can have a greater impact on the composition of prey communities at lower than higher latitudes, whether predation could also differentially impact traits of prey across different latitudes is mostly unknown, especially in marine communities.  Introduced prey, which lack an evolutionary history with resident predators, … Continue reading Predation has higher effects on traits of introduced prey at lower than higher latitudes

Distinct carbon fractions drive a generalisable two pool model of fungal necromass decomposition and impact nitrogen release

Craig R. See, Chris W. Fernandez, Anna M Conley, Lang C. DeLancey, Katherine A. Heckman, Peter G. Kennedy, Sarah E. Hobbie Fungi play a crucial role in the cycling of carbon and nutrients in terrestrial ecosystems. The majority of fungal research in ecology focuses on the effects of living fungi and the role they play as decomposers, pathogens, and symbionts. Recently, however, fungi are gaining … Continue reading Distinct carbon fractions drive a generalisable two pool model of fungal necromass decomposition and impact nitrogen release