Abstract Purpose The tropical phosphorus cycle and its relation to soil (P) availability are a major uncertainty in projections of forest productivity. In highly weathered soils with low P concentrations, plant microbial communities depend on abiotic biotic processes acquire P. We explored the seasonality relative importance drivers controlling fluctuation common pools via such as litter produc...

Application of meteoric 10 Be inventories and Be/ 9 ratios to determine surface ages, erosion rates, denudation rates requires understanding the conditions under which functions as an open vs. closed system near Earth's surface. Here, we investigate biologically mediated beryllium isotope mobility in oak-hickory forest eastern North America. We report concentrations soils, roots, leaves four de...

Abstract. Arctic warming and permafrost degradation are modifying northern ecosystems through changes in microtopography, soil water dynamics, nutrient availability, vegetation succession. Upon degradation, the release of deep stores nutrients, such as nitrogen phosphorus, from newly thawed stimulates production. More specifically, wetter lowlands show an increase sedges (as part graminoids), w...

The literature suggests that biochar increases the fertility of degraded, nutrient-poor tropical soils. We hypothesized addition (a) tree growth in two plantations on Ultisols south Ecuadorian Amazon region, (b) reduces litterfall during dry season because soil remains moister, and (c) improves benefit–cost ratio plantation. grew species—the native leguminous Schizolobium parahyba var. amazonic...

Predicting the environmental fate of Cs radionuclides in forest ecosystems is important for the effective management and assessment of radioactively contaminated forest areas. A large proportion of the radioactively contaminated areas in Japan consist of forest ecosystems, and most of these areas are artificial forests that are used for timber production [e.g., Japanese cedar (Cryptomeria japon...

The stability over time of the organic C stocked in soils under undisturbed ecosystems is poorly studied, despite being suitable for detecting changes related to climate fluctuations and global warming. Volcanic soils often show high organic C contents due to the stabilization of organic matter by short-range ordered minerals or Al-humus complexes. We investigated the dynamics of different orga...

Ecological disturbances can significantly affect biogeochemical cycles in terrestrial ecosystems, but the biogeochemical consequences of the extensive mountain pine beetle outbreak in high elevation whitebark pine (WbP) (Pinus albicaulis) ecosystems of western North America have not been previously investigated. Mountain pine beetle attack has driven widespread WbP mortality, which could drive ...

Nitrogen (N) is considered the dominant limiting nutrient in temperate regions, while phosphorus (P) limitation frequently occurs in tropical regions, but in subtropical regions nutrient limitation is poorly understood. In this study, we investigated N and P contents and N:P ratios of foliage, forest floors, fine roots and mineral soils, and their relationships with community biomass, litterfal...

We compared radiation-use efficiency of growth (epsilon;), defined as rate of biomass accumulation per unit of absorbed photosynthetically active radiation, of forest plots exposed to ambient (approximately 360 micro l l-1) or elevated (approximately 560 micro l l-1) atmospheric CO2 concentration ([CO2]). Large plots (30-m diameter) in a loblolly pine (Pinus taeda L.) plantation, which containe...