Results 61 to 70 of about 167,285 (319)

Landscape Change and Threats to Conservation of River Dolphin Inia araguaiaensis (Cetacea: Iniidae) in the Brazilian Savanna

International Review of Hydrobiology, EarlyView.
ABSTRACT River dolphins are the least studied and most threatened cetaceans. Anthropogenic activities, including habitat fragmentation, pollution, and declining fish stocks, pose significant challenges to their survival. This study evaluated the effects of landscape changes resulting from human activity on the encounter rates of the putative species of
Cristiane Gonçalves de Moraes, Miriam Marmontel, Mariana Paschoalini Frias, Marcelo Oliveira‐da‐Costa, Paulo De Marco Junior   +4 more
wiley   +1 more source

Surface water irrigation reservoirs improve groundwater recovery in a heavily stressed aquifer

Journal of Environmental Quality, EarlyView.
Abstract Expansion of irrigated cropland area in eastern Arkansas has led to the formation of regional cones of depression and creation of critical groundwater areas for the Mississippi River Valley alluvial aquifer (MRVA) in Arkansas. In response, use of surface water reservoirs for irrigation in the Grand Prairie critical groundwater area (GPCGA) has
Joshua M. Blackstock, Obembe Odipo, Aaron M. Shew, Michele L. Reba, Joseph M. Massey, Phillip R. Owens, Christopher D. Delhom   +6 more
wiley   +1 more source

Above-ground biomass change estimation using national forest inventory data with Sentinel-2 and Landsat 8 [PDF]

arXiv, 2020
This study aimed at estimating total forest above-ground net change (Delta AGB, Mt) over five years (2014-2019) based on model-assisted estimation utilizing freely available satellite imagery. The study was conducted for a boreal forest area (approx. 1.4 Mill hectares) in Norway where bi-temporal national forest inventory (NFI), Sentinel-2, and Landsat
arxiv  

Evaluating occurrence and abundance of displaying male American woodcock (Scolopax minor) north of the current Singing‐Ground Survey range

The Journal of Wildlife Management, EarlyView.
The American Woodcock Singing‐Ground Survey (SGS) may not cover all available woodcock breeding range, particularly in more northern regions. Using SGS data collected in Canada between 2000 and 2019, we evaluated the relationship between 16 landscape covariates and male woodcock occurrence and abundance and we developed a predictive map to identify ...
Kristin Bianchini, Barbara Frei, Amelia R. Cox, Christian Roy   +3 more
wiley   +1 more source

Landsat Time Series Assessment of Invasive Annual Grasses Following Energy Development

Remote Sensing, 2019
Invasive annual grasses are of concern in much of the western United States because they tolerate resource variability and have high reproductive capacity, with propagules that are readily dispersed in disturbed areas like those created and maintained ...
Miguel L. Villarreal, Christopher E. Soulard, Eric K. Waller   +2 more
doaj   +1 more source

Determination of Land Degradation in Romania at a Local Scale Using Advanced Analytical Techniques

Land Degradation &Development, Volume 36, Issue 5, Page 1614-1627, March 2025.
ABSTRACT Land degradation (LD) threatens the food security and general welfare of many people globally. Land Degradation Neutrality (LDN) is a pivotal goal within the global sustainability agenda, particularly under Sustainable Development Goal (SDG) 15.3.1, which measures the proportion of land that is degraded over total land area.
Kinga Temerdek‐Ivan, József Benedek, Ibolya Török, Iulian‐Horia Holobâcă, Mircea Alexe   +4 more
wiley   +1 more source

Evaluation of temporal compositing algorithms for annual land cover classification using Landsat time series data

International Journal of Digital Earth, 2023
In this paper, four widely used temporal compositing algorithms, i.e. median, maximum NDVI, medoid, and weighted scoring-based algorithms, were evaluated for annual land cover classification using monthly Landsat time series data.
Xichen Meng, Shuai Xie, Lin Sun, Liangyun Liu, Yilong Han   +4 more
doaj   +1 more source

Global cross-calibration of Landsat spectral mixture models [PDF]

arXiv, 2016
Data continuity for the Landsat program relies on accurate cross-calibration among sensors. The Landsat 8 OLI has been shown to exhibit superior performance to the sensors on Landsats 4-7 with respect to radiometric calibration, signal to noise, and geolocation. However, improvements to the positioning of the spectral response functions on the OLI have
arxiv  

Heavy Metal Contamination in Arenillas Ecological Reserve Soils: Correlation and Conservation Impact

Land Degradation &Development, EarlyView.
ABSTRACT This study addresses the critical knowledge gap regarding heavy metal contamination in the soils of the Arenillas Ecological Reserve (AERv), located on the southwest coast of Ecuador. Despite being a fragile and highly biodiverse ecosystem, little is known about the magnitude, spatial distribution, and drivers of heavy metal contamination in ...
Vinicio Carrión‐Paladines, James Calva, Teddy Ochoa‐Pérez, Leslye Ruiz, Fausto López‐Rodríguez   +4 more
wiley   +1 more source

Estimation of Reference Evapotranspiration at Regional Scale using Remote Sensing Data in Shahrekord Plain - Comparing the Results of SEBAL and METRIC Models to Lysimetric Measurements

علوم آب و خاک, 2017
Conventional methods for estimating evapotranspiration are based on point measurement and suitable for local areas, therefore, cannot be generalized for larger areas or watershed basins.
A. Morshedi, M. Naderi, S. H. Tabatabaei, J. Mohammadi   +3 more
doaj