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Issuesland managementLandLibrary Resource
There are 8, 235 content items of different types and languages related to land management on the Land Portal.
Displaying 3565 - 3576 of 6712

Comparison of soil respiration among three different subalpine ecosystems on eastern Tibetan Plateau, China

Journal Articles & Books
December, 2014
China

The pattern of soil respiration and its responsible factors are still unclear in subalpine ecosystems. In this study, we used a static chamber system to measure soil respiration in a primary Abies fabri (Masters) Craib forest, a secondary A. fabri forest and a clear-cut land on Gongga Mountain, east of Tibetan Plateau in China. Our results showed there were substantial diurnal and temporal variations in these three subalpine ecosystems. The diurnal coefficient of variation (CV) of soil respiration was lowest in primary forest (20.5%), and highest in clear-cut land (40.4%).

Influence of cropping system management and crop residue addition on soil carbon turnover through the microbial biomass

Journal Articles & Books
December, 2015

The fate and turnover of microbial carbon (C) in an arable soil following crop residue addition likely depends on the quality of both native soil organic matter (SOM) and residues. We labeled the microbial biomass with ¹³C-glucose and followed the microbial ¹³C turnover into different SOM pools under the influence of three plant amendments (mature wheat, immature wheat, and vetch) in a laboratory incubation experiment using a soil with two different contents of organic C (0.9 and 1.3 %) owing to different soil management.

moral basis for conservation: how is it affected by culture?

Journal Articles & Books
December, 2015

We believe that conservation practice is sometimes inhibited by misguided respect for the cultural background in which conservation problems occur. This respect may be rooted in a philosophical standpoint asserting that culturally distinct values cannot be objectively judged against one another, and that those values are therefore equally valid. Here we consider the influence of this school of thought, known as “moral relativism”, in the context of the moral basis for biodiversity conservation as it is currently understood.

satellite analysis of contrasting fire patterns in Aboriginal- and Euro-Australian lands in tropical North Australia

Journal Articles & Books
December, 2007
Australia

We use satellite imagery to compare and contrast fire patterns across a repeating mosaic of vegetation types occurring within the tropical savanna of the Northern Territory, Australia. Our study area included different land management settings that encapsulate three contrasting styles of management that have developed following European settlement in northern Australia: Decentralized fire management carried out by small Aboriginal communities widely dispersed across a large landscape.

Understanding landscape patterns of temporal variability in avian populations to improve environmental impact assessments

Journal Articles & Books
December, 2013

It is recognized that wildlife populations exhibit spatial and temporal variability in patterns of species richness across heterogeneous landscapes. This phenomenon can prove problematic for environmental practitioners when attempting to complete comprehensive environmental assessments (EAs) with limited field surveys. A better understanding of regional spatio-temporal patterns in population dynamics should enhance site-level decision-making.

Influence of Vertical and Horizontal Habitat Structure on Nationwide Patterns of Avian Biodiversity

Journal Articles & Books
December, 2013
United States of America

With limited resources for habitat conservation, the accurate identification of high-value avian habitat is crucial. Habitat structure affects avian biodiversity but is difficult to quantify over broad extents. Our goal was to identify which measures of vertical and horizontal habitat structure are most strongly related to patterns of avian biodiversity across the conterminous United States and to determine whether new measures of vertical structure are complementary to existing, primarily horizontal, measures.

Automated integration of lidar into the LANDFIRE product suite

Journal Articles & Books
December, 2015

Accurate information about three-dimensional canopy structure and wildland fuel across the landscape is necessary for fire behaviour modelling system predictions. Remotely sensed data are invaluable for assessing these canopy characteristics over large areas; lidar data, in particular, are uniquely suited for quantifying three-dimensional canopy structure. Although lidar data are increasingly available, they have rarely been applied to wildland fuels mapping efforts, mostly due to two issues.

Organic farming and heterogeneous landscapes positively affect different measures of plant diversity

Journal Articles & Books
December, 2014
Sweden

Increasing landscape heterogeneity and organic farming practices are known to enhance species richness in agroecosystems. However, little is known about the consequences of these management options on other biodiversity components such as community composition, phylogenetic structure and functional diversity which may be more closely linked to ecosystem functioning. We surveyed semi‐natural plant communities within the uncultivated field margins of 18 arable farms in Skåne, south Sweden.

Labile nitrogen, carbon, and phosphorus pools and nitrogen mineralization and immobilization rates at low temperatures in seasonally snow-covered soils

Journal Articles & Books
December, 2007

Surface mineral horizons from four ecosystems sampled in the northwestern Italian Alps were incubated at -3 and +3°C to simulate subnivial and early thaw period temperatures for a seasonally snow-covered area. The soil profiles at these sites represent extreme examples of management, grazed meadow (site M) and extensive grazing beneath larch (site L) or naturally disturbed by avalanche and colonized by alder (site A) and the expected forest climax vegetation beneath fir (site F).