Results 71 to 80 of about 6,310 (207)
The Arab peninsula suffers from intense wadi erosion, which is been expressed by a dense net of wadis that are correlated by overland flows to their surrounded landforms (e.g. loess slopes and rocky grounds).
Amir Mor-Mussery, Salem El-Freijat
doaj +1 more source
Grassland productivity limited by multiple nutrients [PDF]
Terrestrial ecosystem productivity is widely accepted to be nutrient limited1. Although nitrogen (N) is deemed a key determinant of aboveground net primary production (ANPP)2,3, the prevalence of co-limitation by N and phosphorus (P) is increasingly ...
Adler, Peter B. +38 more
core +4 more sources
Abstract Aboveground net primary production (ANPP) is a key ecosystem characteristic and of fundamental importance for essentially all aspects of matter and energy fluxes in terrestrial ecosystems. Various methods for estimating ANPP are available and despite partial consensus on ‘best practice methods’ important methodological issues remain ...
Jan Christian Ruppert, Anja Linstädter
openaire +1 more source
Soil Moisture Buffers the Impact of Precipitation Variability on Ecosystem Productivity
Abstract Water availability governs ecosystem productivity, yet estimates of vegetation sensitivity to water can differ greatly depending on whether the sensitivity is examined spatially or temporally. In particular, the spatial sensitivity is often reported to be much stronger than temporal sensitivities, leading to highly uncertain projections of ...
Huiqi Wang +6 more
wiley +1 more source
‘Gold, guns & goons’: the complexity of electoral irregularities in Nigeria, 1999-2007 [PDF]
Electoral irregularities have become an irritant but inseparable aspect of democratic development in several countries of the world. From the US Florida electoral crisis of 2000 to the Orange Revolution in Ukraine in 2004/2005, which was staged to ...
Osiki, Omon Merry
core
No effect of seed source on multiple aspects of ecosystem functioning during ecological restoration: cultivars compared to local ecotypes of dominant grasses [PDF]
Genetic principles underlie recommendations to use local seed, but a paucity of information exists on the genetic distinction and ecological consequences of using different seed sources in restorations.
Baer, Sara G +8 more
core +2 more sources
An accurate quantification in the separation of the relative contributions of climate change and human activities on grassland dynamics is crucial for controlling grassland degradation.
Yangyang Liu +9 more
doaj +1 more source
Successional change in species composition alters climate sensitivity of grassland productivity. [PDF]
Succession theory predicts altered sensitivity of ecosystem functions to disturbance (i.e., climate change) due to the temporal shift in plant community composition.
Guo, Xue +12 more
core +2 more sources
Assessing Land Degradation/Recovery in the African Sahel from Long-Term Earth Observation Based Primary Productivity and Precipitation Relationships [PDF]
The ‘rain use efficiency’ (RUE) may be defined as the ratio of above-ground net primary productivity (ANPP) to annual precipitation, and it is claimed to be a conservative property of the vegetation cover in drylands, if the vegetation cover is not ...
Alcaraz-Segura +64 more
core +3 more sources
Understanding the stability dynamics of naturally occurring grassland succession under nutrient enrichment is crucial for effective ecosystem management. We carried out an 11‐year field experiment to examine how grassland community stability responds to nitrogen (N) enrichment across the three successional stages (early‐, mid‐ and late‐successional ...
Hanghang Tuo +14 more
wiley +1 more source

