Results 111 to 120 of about 30,151 (305)
Spatial analysis of benthic habitat distribution of coral reef ecosystems in Luang Island, Indonesia [PDF]
BIO Web of ConferencesCoral reef ecosystems are essential for biodiversity and coastal resilience, but are increasingly threatened by human activities and climate change.
Rifai Ahmad +4 more
doaj +1 more source
Geomorphic Effects and Habitat Impacts of Large Wood at Restoration Sites in New England
River Research and Applications, EarlyView.ABSTRACT Large wood (used interchangeably with the term “instream wood”), which refers to trees, logs and other wood within a channel, is beneficial to river ecosystems and is being used more frequently as a component of river restoration projects. We identified metrics to evaluate the effectiveness of large wood to promote ecological and geomorphic ...
Audrey J. Turcotte +2 more
wiley +1 more source
Investigation of bottom fishing impacts on benthic structure using multibeam sonar, sidescan and video [PDF]
, 2005 Bottom fishing gear is known to alter benthic structure, however changes in the shape of the sea floor are often too subtle to be detected by acoustic remote sensing.
Malik, Mashkoor A., Mayer, Larry A.
core +1 more source
Blending single beam RoxAnn and multi-beam swathe QTC hydro-acoustic discrimination techniques for the Stonehaven area, Scotland, UK [PDF]
, 2011 Surface properties of the seabed in a 180 km2 area of coastal waters (14-57 m depth) off northeast Scotland were mapped by hydro-acoustic discrimination using single and multi-beam echosounders linked to signal processing systems (RoxAnn for the single ...
Armstrong, F. +3 more
core +1 more source
River Research and Applications, EarlyView.ABSTRACT River regulation following damming is often associated with deleterious downstream effects, in large part due to reduced total discharge and disruption of seasonal flooding. These effects would be expected to be exacerbated by drought, particularly extended drought.
Jeffrey G. Holmquist +1 more
wiley +1 more source
DiversityCoral reef ecosystems are biodiversity hotspots that provide essential ecological and environmental services but are increasingly threatened by anthropogenic pressure and climate change.
Juan Emanuel Frías-Vega +4 more
doaj +1 more source
Sensor-Assisted Video Mosaicing for Seafloor Mapping [PDF]
, 2001 This paper discusses a proposed processing technique for combining video imagery with auxiliary sensor information. The latter greatly simplifies image processing by reducing complexity of the transformation model.
Cutter, Randy G, Jr. +2 more
core +1 more source
River Research and Applications, EarlyView.ABSTRACT Florida's regulatory framework requires the establishment of minimum flows to protect aquatic ecosystems and water resources from significant harm. One of the primary methods used to evaluate significant harm is assessment of instream habitat, which relies on Habitat Suitability Criteria (HSC) curves that relate flow regimes and habitat ...
Eric J. Nagid, Kym Rouse Holzwart
wiley +1 more source
Benthic habitat mapping in the Olympic Coast National Marine Sanctuary: Classification of side scan sonar data from survey HMPR-108-2002-01: Version I [PDF]
, 2006 In September 2002, side scan sonar was used to image a portion of the sea floor in the northern OCNMS and was mosaiced at 1-meter pixel resolution using 100 kHz data collected at 300-meter range scale.
Cochrane, G. R., Intelmann, Steven S.
core
Remote Sensing in Ecology and Conservation, EarlyView.Targeted conservation measures are contingent on robust knowledge of spatio‐temporal animal distribution in areas of interest. We explore unmanned aerial vehicle (UAV) transect monitoring as a novel method for standardized digital aerial surveys of marine megafauna by investigating the fine‐resolution spatio‐temporal distribution of harbour porpoises ...
Dinah Hartmann +2 more
wiley +1 more source