The purpose of this research is to create a baseline model of soil compaction response to trampling and a methodology to model the effects of trampling on soil. Although trampling studies have been conducted in the past, the analysis of military training in part provides a different perspective and approach. The data showed bulk densities remained relatively constant for a time and then began to increase at an increasing rate for several hundred passes and finally leveled and remained at or below 1.30 g/cm3 through the remainder of the experiment. Mathematical models were created based on empirical data from a trampling experiment using a more standard logistical growth curve as well as curves based on Weibull and gamma cumulative distribution functions (CDFs). The experiment and the resulting models give quantifiable continuous inference on the effects of trampling, as opposed to the existing qualitative assessments. These baseline models will be the foundation for future studies of land management when trampling occurs.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.jenvman.2006.06.012 | DOI Listing |
Microbiome
November 2024
Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
Background: The extensive use of antibiotics in the global livestock industry in recent decades has accelerated the accumulation and dissemination of antibiotic-resistance genes (ARGs) within terrestrial ecosystems. This occurs due to the limited absorption of most antibiotics, leading to their release into the environment through feces and urine. This poses a significant threat to both the environment and human health.
View Article and Find Full Text PDFNew Phytol
November 2024
Department of Environmental Sciences, Tel-Hai College, Tel-Hai, 12208, Israel.
Direct human activity and global climatic changes are threatening the existence of many vegetated habitats. Seedling establishment, one of the riskiest plant life stages, must be successful for such habitats to persist. The establishment of seedlings is known to be enhanced by nurse effects, but most studies to date have looked at the nursing effects of plants while sidelining inanimate objects.
View Article and Find Full Text PDFProc Biol Sci
October 2024
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
J Environ Manage
September 2024
Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, 2125, Australia.
Drylands provide a wide range of important ecosystem functions but are sensitive to environmental changes, especially human management. Two major land use types of drylands are grasslands and croplands, which are influenced by intensive grazing activities and agricultural management, respectively. However, little is known about whether the ecosystem functioning of these two land use types is predominated affected by human management, or environmental factors (intrinsic environmental factors and factors modified by human management).
View Article and Find Full Text PDFBMC Ecol Evol
August 2024
CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Faculdade de Ciências e Tecnologias, InBIO Laboratório Associado, Universidade dos Açores, R. Mãe de Deus 13A, Ponta Delgada, 9500-321, Portugal.
Background: Anthropogenic threats are causing alteration of coastal areas worldwide. Most of the coastal biodiversity is endangered, taking a particular toll on island ecosystems, like the Azores. To better understand the biotic and abiotic factors constraining the distribution and conservation status of two endemic plants, Azorina vidalii (Campanulaceae) and Lotus azoricus (Fabaceae), we performed a global survey of coastal plant communities in the archipelago, also covering environmental descriptors, natural and anthropogenic threats.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!