Results 51 to 60 of about 43,178 (255)

Hydrography of the Andes [PDF]

The Geographical Journal, 1905
n ...
openaire   +2 more sources

Critical tipping points in dung beetle communities: Implications for conservation in the Atlantic Forest biome

Insect Conservation and Diversity, EarlyView.
Minor land‐use changes consistently lead to abrupt biodiversity shifts across all diversity dimensions, favoring generalist dung beetle species while excluding sensitive specialists. These shifts are observed at lower environmental change rates than previously considered, with significant changes apparent after just 25% habitat loss.
Paula Ribeiro Anunciação, André Tavares, Fernando Z. Vaz‐de‐Mello, Milton C. Ribeiro, Raffael Ernst   +4 more
wiley   +1 more source

An Automatic Generalization Method of a Block-Based Digital Depth Model Based on Surface Curvature Features

Journal of Marine Science and Engineering
Addressing the limitations of current multi-scale seabed terrain construction methods for a Digital Depth Model (DDM) and the low computational efficiency of automatic generalization algorithms, this paper draws on the concept of curvature simplification
Dong Wang, Jian Dong, Lulu Tang, Mengkai Ma, Tian Xie   +4 more
doaj   +1 more source

A new catfish species of Microcambeva Costa & Bockmann, 1994 (Siluriformes: Trichomycteridae) from southern Brazil, with a redescription of M. ribeirae Costa, Lima & Bizerril, 2004

Journal of Fish Biology, EarlyView.
Abstract Among the few species of Microcambeva reported as occurring in more than one hydrographic basin, M. ribeirae has been previously listed from both the Ribeira de Iguape and the Guaraqueçaba basins. However, morphological and molecular analyses revealed that the specimens from Guaraqueçaba represent a new species, which is described in this ...
Lucas S. de Medeiros, Igor C. A. Souto‐Santos, Paulo A. Buckup, Juliano Ferrer, Vinicius J. C. Reis, Mario de Pinna, Sergio M. Q. Lima   +6 more
wiley   +1 more source

Multi-Scale Marine Object Detection in Side-Scan Sonar Images Based on BES-YOLO

Sensors
Aiming at the problem of low accuracy of multi-scale seafloor target detection in side-scan sonar images with high noise and complex background texture, a model for multi-scale target detection using the BES-YOLO network is proposed.
Quanhong Ma, Shaohua Jin, Gang Bian, Yang Cui   +3 more
doaj   +1 more source

Future directions in hydrography using satellite-derived bathymetry [PDF]

, 2013
Satellite remote sensing provides useful reconnaissance tool for mapping near-shore bathymetry, characterizing a coastal area and monitoring any seafloor changes that may have occurred since the last hydrographic survey of the area.
Alexander, Lee, Armstrong, Andy, Azuike, Chukwuma, Parrish, Christopher, Pe\u27eri, Shachak, Sault, Maryellen   +5 more
core   +1 more source

Analyzing the discharge regime of a large tropical river through remote sensing, ground-based climatic data, and modeling [PDF]

, 1996
This study demonstrates the potential for applying passive microwave satellite sensor data to infer the discharge dynamics of large river systems using the main stem Amazon as a test case.
Annette L. Schloss, Arkin, Baumgartner, Bhaskar J. Choudhury, Birkett, Chahine, Charles J. Vörösmarty, Choudhury, Choudhury, Choudhury, Committee on Global Change, Cort J. Willmott, Defense Mapping Agency Aerospace Center (DMAAC), Defense Mapping Agency Aerospace Center (DMAAC), Defense Mapping Agency Aerospace Center (DMAAC), Defense Mapping Agency Aerospace Center (DMAAC), Defense Mapping Agency Aerospace Center (DMAAC), Defense Mapping Agency Aerospace Center (DMAAC), Dickinson, Dümenil, Giddings, Global Runoff Data Centre (GRDC), Imhoff, Koblinsky, Korzoun, Lean, Leeden, Legates, Legates, Meade, Melillo, Mintz, Mintz, Morris, Nepstad, Pierce, Rastetter, Richey, Rodda, Rzóska, Salati, Salati, Scott M. Robeson, Serafini, Shukla, Sioli, Sippel, Sippel, Skole, Timothy J. Dorman, Timothy K. Stearns, Vörösmarty, Vörösmarty, Vörösmarty, Webb, Willmott, Willmott, Willmott, Willmott, Willmott, Willmott   +60 more
core   +2 more sources

The Greenland–Scotland Ridge in a Changing Ocean: Time to Act?

Marine Ecology, EarlyView.
ABSTRACT The Greenland–Scotland Ridge is a submarine mountain that rises up to 500 m below the sea surface and extends from the east coast of Greenland to the continental shelf of Iceland and across the Faroe Islands to Scotland. The ridge not only separates deeper ocean basins on either side, that is, the North Atlantic and Arctic oceans, but also ...
Christophe Pampoulie, Saskia Brix, Haseeb S. Randhawa   +2 more
wiley   +1 more source

Observation of Statistical Characteristics and Vertical Structures of Surface Warm Cyclonic Eddies and Cold Anticyclonic Eddies in the North Pacific Subtropical Countercurrent Region

Journal of Marine Science and Engineering
Conventional wisdom about mesoscale eddies is that cyclonic (anticyclonic) eddies are commonly associated with cold(warm) surface cores. Nevertheless, plenties of surface warm cyclonic eddies (WCEs) and cold anticyclonic eddies (CAEs) in the North ...
Yaowei Ma, Qinghong Li, Xiangjun Yu, Song Li, Xingyu Zhou   +4 more
doaj   +1 more source

DS-SIAUG: A Self-Training Approach Using a Disrupted Student Model for Enhanced Side-Scan Sonar Image Augmentation

Sensors
Side-scan sonar is a principal technique for subsea target detection, where the quantity of sonar images of seabed targets significantly influences the accuracy of intelligent target recognition.
Chengyang Peng, Shaohua Jin, Gang Bian, Yang Cui   +3 more
doaj   +1 more source