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Biological Feedbacks in Global Desertification
TLDR
Studies of ecosystem processes on the Jornada Experimental Range in southern New Mexico suggest that longterm grazing of semiarid grasslands leads to an increase in the spatial and temporal heterogeneity of water, nitrogen, and other soil resources, which leads to the desertification of formerly productive land.
Statistical ecology: a primer on methods & computing
TLDR
This paper presents a meta-analysis of the literature on community classification and Ordination Interpretation using data from the Ecological Community Data and SPECIES ABUNDANCE RELATIONS as a guide.
Global Desertification: Building a Science for Dryland Development
TLDR
The DDP, supported by a growing and well-documented set of tools for policy and management action, helps navigate the inherent complexity of desertification and dryland development, identifying and synthesizing those factors important to research, management, and policy communities.
Modelling photosynthesis of cotton grown in elevated CO2
TLDR
Cotton plants were grown in CO2-controlled growth chambers in atmospheres of either 35 or 65 Pa CO2, and despite the accumulation of large amounts of starch, the photosynthetic characteristics of leaves in both treatments were similar, although the maximum rate of Rubisco activity (Vcmax) was ∼10% lower in leaves from plants grown in high CO2.
Impacts of shrub encroachment on ecosystem structure and functioning: towards a global synthesis.
TLDR
It was revealed that encroachment had mixed effects on ecosystem structure and functioning at global scales, and that shrub traits influence the functional outcome of encroachment.
Modifying the ‘pulse–reserve’ paradigm for deserts of North America: precipitation pulses, soil water, and plant responses
TLDR
The analyses indicate that rainfall variability is best understood in terms of sequences of rainfall events that produce biologically-significant ‘pulses’ of soil moisture recharge, as opposed to individual rain events.
Impact of drought on desert shrubs : Effects of seasonality and degree of resource island development
Large areas of semiarid grasslands in the southwestern United States have been virtually replaced by shrubs during the past century. Understanding the causes and consequences of such vegetation
Thermal adaptation of soil microbial respiration to elevated temperature.
TLDR
Using a > 15 year soil warming experiment in a mid-latitude forest, it is shown that the apparent 'acclimation' of soil respiration at the ecosystem scale results from combined effects of reductions in soil carbon pools and microbial biomass, and thermal adaptation of microbial respiration.
Ecological Thresholds: The Key to Successful Environmental Management or an Important Concept with No Practical Application?
TLDR
The scope of the thresholds concept in ecological science is defined and methods for identifying and investigating thresholds using a variety of examples from terrestrial and aquatic environments, at ecosystem, landscape and regional scales are discussed.
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