Results 121 to 130 of about 2,561 (156)

Effects of Temperature and Soil Texture on ANPP in the U.S. Great Plains

Ecology, 1997
Aboveground net primary production (ANPP) in grassland ecosystems is positively related to mean annual precipitation (MAP). However, at any given level of precipitation, other factors may effect ANPP. Our objective was to determine the importance of temperature and soil texture in explaining ANPP in the Great Plains of the United States. We constructed
William K. Lauenroth, Ingrid Burke
exaly   +2 more sources

A Case Report on Potential Postmortem Redistribution of Furanyl Fentanyl and 4-ANPP

Forensic Science International, 2019
Fatal intoxications due to accidental or voluntary intake of synthetic opioids represent an actual emerging issue. We report a case where we have analyzed furanyl fentanyl and its metabolite 4-anilino-N-phenetyl-piperidine (4-ANPP) in blood, urine, gastric content, bile and cerebrospinal fluid.
Matteo Moretti, Claudia Vignali, Angelo Groppi   +2 more
exaly   +4 more sources

Estimating Aboveground Net Primary Production (ANPP) Using Landsat 8-Based Indices: A Case Study From Hir-Neur Rangelands, Iran

Rangeland Ecology and Management, 2020
Aboveground Net Primary Production (ANPP), an indicator of ecosystems’ ability to capture and convert solar energy, is critical to evaluate and manage ecosystem carbon balance index including rangelands.
Ardavan Ghorbani, Asim Biswas, Mehdi Moameri   +2 more
exaly   +2 more sources

Distribution of Furanyl Fentanyl and 4-ANPP in an Accidental Acute Death: A Case Report

Forensic Science International, 2018
Fatalities from emerging synthetic opioids have continued to reach new epidemic proportions throughout the world in recent years. Due to the sparsity of research in new opioid analogs, commonly observed lethal concentrations and their distribution following death have yet to be well documented.
Eric Ingle, Luke N. Rodda
exaly   +3 more sources

Convergence Between ANPP Estimation Methods in Grasslands — A Practical Solution to the Comparability Dilemma

Ecological Indicators, 2014
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 C. Ruppert, Anja Linstädter
exaly   +2 more sources

ANPP Estimates From NDVI for the Central Grassland Region of the United States

Ecology, 1997
Several studies have suggested the existence of a positive relationship be- tween the Normalized Difference Vegetation Index (NDVI) derived from AVHRR/NOAA satellite data and either biomass or annual aboveground net primary production (ANPP) for different geographic areas and ecosystems. We calibrated a 4-yr average of the ingegral of the NDVI (NDVI-J)
William K. Lauenroth, José Paruelo, Howard E. Epstein   +2 more
exaly   +4 more sources

Spatial and Temporal Relationships Between Precipitation and ANPP of Four Types of Grasslands in Northern China

Journal of Environmental Sciences, 2006
Precipitation is considered to be the primary resource limiting terrestrial biological activity in water-limited regions. Its overriding effect on the production of grassland is complex. In this paper, field data of 48 sites (including temperate meadow steppe, temperate steppe, temperate desert steppe and alpine meadow) were gathered from 31 published ...
Yingnian Li, Zhiyun Ouyang
exaly   +3 more sources

ACUTE NEUROLOGIC/PSYCHIATRIC PRESENTATION [ANPP] IN HOSPITALIZED HIV INFECTED PATIENTS

Caliphate Medical Journal, 2015
Background: There are limitations to diagnosing opportunistic infections and diseases etiologically in Human Immunodeficiency Virus (HIV) infection in much of sub- Saharan Africa. World Health Organization advocates syndromic management approach although certain presentations may have adverse outcome.
Habib ZG, Habib AG
openaire   +1 more source

Hydrologic Thresholds and Changes in ANPP of Artificial Sand-Fixing Vegetation in a Desert-Oasis Ecotone in Northwest China

Journal of Arid Environments, 2017
Abstract The interactive relationships between ecological and hydrological processes drive plant performance, community structure, and community succession in arid areas. Yet the nature of potential hydrologic thresholds for responses of vegetation remains poorly understood.
Wenzhi Zhao
exaly   +3 more sources

Effects of warming and grazing on soil N availability, species composition, and ANPP in an alpine meadow

Ecology, 2012
Uncertainty about the effects of warming and grazing on soil nitrogen (N) availability, species composition, and aboveground net primary production (ANPP) limits our ability to predict how global carbon sequestration will vary under future warming with grazing in alpine regions.
Shiping, Wang, Jichuang, Duan, Guangping, Xu, Yanfen, Wang, Zhenhua, Zhang, Yichao, Rui, Caiyun, Luo, Burenbayin, Xu, Xiaoxue, Zhu, Xiaofeng, Chang, Xiaoyong, Cui, Haishan, Niu, Xinquan, Zhao, Wenying, Wang   +13 more
openaire   +2 more sources