Infrared heaters to conduct 24-hour continuous warming in a semi-arid grassland on the Mongolian Plateau, China. Photo credit: Jianyang Xia.

Non-additive responses of soil respiration to five-year manipulations of elevated temperature and nitrogen addition in a semi-arid grassland

Jian Song, Jianyang Xia, Dafeng Hui, Mengmei Zheng, Jing Wang, Jingyi Ru, Haidao Wang, Qingshan Zhang, Chao Yang, Shiqiang Wan Read the paper in full here Over the past several decades, numerous single-factor experiments have artificially manipulated temperature or nitrogen (N) availability and clearly demonstrated the potential individual effects of climate warming and atmospheric N deposition on soil respiration, which represents the second largest carbon … Continue reading Non-additive responses of soil respiration to five-year manipulations of elevated temperature and nitrogen addition in a semi-arid grassland

The photo shows the greenhouse litter decomposition experiment (Youzheng Zhang took the photo).

Leaf litter of high latitude origin decomposed faster for two plant species in Chinese coastal wetlands

Wu, Jihua; Zhang, Youzheng; Pennings, Steven; Liu, Zixia; Li, Bo Climatic variation tends to create a geographical pattern of higher in situ decomposition rates at low latitudes with a hot and wet environment. However, variation in litter decomposability may oppose this pattern, because litter from tropical plants is usually most difficult to decompose. In this study we examined the latitudinal variation in decomposition within species. … Continue reading Leaf litter of high latitude origin decomposed faster for two plant species in Chinese coastal wetlands

EucFACE site, a Eucalyptus native, temperate, low-P forest in Eastern Australia exposed to eCO2, where this study was carried out. Photo taken by: Johanna Pihlblad.

The influence of roots on mycorrhizal fungi and soil C dynamics in a P-limited natural Eucalyptus forest

Castañeda-Gómez, Laura; Powell, Jeff; Ellsworth, David; Pendall, Elise; Carrillo, Yolima Soil organic matter (SOM) is one of the greatest reservoirs of carbon (C) on Earth, formed and preserved over time thanks to a balance of C inputs and outputs occurring in parallel. This dynamic balance can be disrupted by climate change factors such as elevated atmospheric CO2 (eCO2) concentrations. ECO2 stimulates plant photosynthetic activity, leading … Continue reading The influence of roots on mycorrhizal fungi and soil C dynamics in a P-limited natural Eucalyptus forest

Scavenging beetles control the temporal response of soil communities to carrion decomposition

Caruso, Tancredi; Ilardi, Marco; Cotter, Sheena; Hammer, Edith; Riddell, Gillian On land, soil organisms are responsible for the decomposition of biological matter from dead organisms. The resulting gas emissions account for at least 50% of all respiration on Earth. Depending on the balance between photosynthesis and respiration, soil can be either a source or a sink of greenhouse gases, which affect climate change. Also, decomposition … Continue reading Scavenging beetles control the temporal response of soil communities to carrion decomposition

Cover crop roots collected during experiment harvest. 2018. (Nicholas Honvault)

Interactions between belowground traits and rhizosheath fungal and bacterial communities for phosphorus acquisition

Nicolas Honvault, David Houben, Stephane Firmin, Hacene Maglouli, Frederic Laruelle, Joel Fontaine, Anissa Lounes, Arnaud Coutu, Hans Lambers, Michel-Pierre Faucon Phosphorus (P) plays a major role in many ecosystem functions. Understanding and managing ecosystem functioning thus requires gaining insight into P cycling, and especially into the multiple factors involved, such as plant communities, climate, soil properties and soil microbial communities. Interactions between these factors have … Continue reading Interactions between belowground traits and rhizosheath fungal and bacterial communities for phosphorus acquisition

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

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