نتایج جستجو برای: ecohydrology

تعداد نتایج: 216  

2011
Carl C. Trettin Martin F. Jurgensen Margaret R. Gale James W. McLaughlin

We measured the change in aboveand below-ground carbon and nutrient pools 11 years after the harvesting and site preparation of a histic-mineral soil wetland forest in the Upper Peninsula of Michigan. The original stand of black spruce (Picea mariana), jack pine (Pinus banksiana) and tamarack (Larix laricina) was whole-tree harvested, and three post-harvest treatments (disk trenching, bedding, ...

Journal: :Global change biology 2013
Leander D L Anderegg William R L Anderegg John Abatzoglou Alexandra M Hausladen Joseph A Berry

Globally documented widespread drought-induced forest mortality has important ramifications for plant community structure, ecosystem function, and the ecosystem services provided by forests. Yet the characteristics of drought seasonality, severity, and duration that trigger mortality events have received little attention despite evidence of changing precipitation regimes, shifting snow melt tim...

Journal: :Tree physiology 2008
K R Hultine S E Bush A G West K G Burtch D E Pataki J R Ehleringer

Acer negundo Sarg. (box elder) is a dioecious tree species that dominates riparian systems at mid elevations throughout the southwest and Intermountain West of the United States. Previous studies have shown that female A. negundo trees occur at higher frequencies along stream margins, whereas males occur at higher frequencies in drier microsites. To better understand the adaptive significance o...

Journal: :Remote Sensing 2022

Drought is the most widespread climatic extreme that has negative impacts on ecohydrology. Studies have shown drought can cause certain degrees of disturbances to different ecohydrological variables, but duration and severity thresholds are sufficient changes in variables remain largely unknown. At same time, we should not ignore dynamic variation drought’s effect under condition climate change...

Journal: :Ecohydrology and Hydrobiology 2021

In the Greater Serengeti-Mara ecosystem, with Serengeti National Park (SNP) at its core, people and wildlife are strongly dependent on water supply that has a strong seasonal inter-annual variability. The Mara River, only perennial river in SNP, number of small streams originate from outside SNP before flowing through it. those watersheds increasing grazing pressure livestock, deforestation, ir...

2017
Yizhao Chen Jianlong Li Weimin Ju Honghua Ruan Zhihao Qin Yiye Huang Nasreen Jeelani José Padarian Pavel Propastin

Water-use efficiency (WUE), defined as the ratio of net primary productivity (NPP) to evapotranspiration (ET), is an important indicator to represent the trade-off pattern between vegetation productivity and water consumption. Its dynamics under climate change are important to ecohydrology and ecosystem management, especially in the drylands. In this study, we modified and used a late version o...

2016
Timothy D. Perry Julia A. Jones

Ecohydrology 2016; 1–13 Abstract Despite controversy about effects of plantation forestry on streamflow, streamflow response to forest plantations over multiple decades is not well understood. Analysis of 60‐year records of daily streamflow from eight paired‐basin experiments in the Pacific Northwest of the United States (Oregon) revealed that the conversion of old‐growth forest to Douglas‐fir ...

2007
H. Asbjornsen M. Gomez-Cardenas L. A. Brudvig C. M. Greenan K. Schilling

Oak savannas, once common in the Midwest, are now isolated remnants within agricultural landscapes. Savanna remnants are frequently encroached by invasive trees to become woodlands. Thinning and prescribed burning can restore savanna structure, but the ecohydrological effects of managing these remnants are poorly understood. In this study, we measured sap flow (Js) to quantify transpiration in ...

Journal: :Hydrology and Earth System Sciences 2022

Abstract. Using water-stable isotopes to track plant water uptake or soil processes has become an invaluable tool in ecohydrology and physiological ecology. Recent studies have shown that laser absorption spectroscopy can measure equilibrated vapour well enough support inference of liquid-stable isotope composition water, on-site real-time. However, current situ systems require the presence ins...

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