Results 141 to 150 of about 372,884 (352)

4. Wochenbericht M77/1 [PDF]

open access: yes, 2008
Im Pazifischen Ozean erstreckt sich westlich von Peru und Ecuador ein riesiges Gebiet, in dem lebenswichtiger Sauerstoff Mangelware ist. Dieses Gebiet ist Ziel der Expedition „M77“, zu der das deutsche Forschungsschiff METEOR am 22. Oktober 2008 ausläuft.
Pfannkuche, Olaf
core  

Effects of Engineered Dam Releases on Benthic Assemblages During Drought and Comparison With Unregulated Reaches

open access: yesRiver 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

Programmed unmanned aerial vehicles show great potential for monitoring marine megafauna in specific areas of interest

open access: yesRemote 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

Impact of parameterization in multiple acoustic index comparisons: practical cases in terrestrial and underwater soundscapes

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Parameter choices in acoustic analyses (sampling frequency, FFT size and window overlap) strongly influence multivariate soundscape separation. Using terrestrial and coral reef recordings, we show that these settings can exaggerate or mask ecological differences, emphasizing the need for parameter sensitivity testing and transparent reporting in ...
Juan C. Azofeifa‐Solano   +8 more
wiley   +1 more source

Akinete formation under nitrogen limitation in an invasive cyanobacterium

open access: yesFrontiers in Microbiology
Invasive species are a global problem threatening the function of ecosystems. Besides prominent species, microbial invaders are considered as “invisible” and have spread over almost all continents.
Catalina Ríos-Henríquez   +1 more
doaj   +1 more source

Incorporating environmental DNA metabarcoding for improved benthic biodiversity and habitat mapping

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Seafloor imagery is commonly used to collect information about the distribution of benthic organisms in order to generate habitat and biodiversity maps. Recent advances in genomics (e.g., environmental DNA; eDNA) show potential to complement video surveys for habitat mapping, but there have been few examples testing this.
Rylan J. Command   +8 more
wiley   +1 more source

Using the Benthic Macroinvertebrates Species Diversity Index to Determine the Water Quality of Antirogo River, Jember Regency

open access: yesJurnal Ilmu Dasar
The Antirogo river, as one of the rivers across the Jember regency, East Java, plays an important role and is used for various activities such as agriculture, domestic, and industrial activities.
Retno Wimbaningrum   +3 more
doaj   +1 more source

Evaluating land–sea linkages using land cover change and coral reef monitoring data: A case study from northeastern Puerto Rico

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Land cover change that leads to increased nutrient and sediment runoff is an important driver of change in coral reef ecosystems. In this study, we combined satellite remote sensing and field monitoring to assess concomitant changes in watershed land cover and coral cover in northeastern Puerto Rico in 2000–2015.
Pirta Palola   +5 more
wiley   +1 more source

The Unusual Mental Barbel of Antarctic «Cryonotothenioid» Fishes of the Subfamily Artedidraconinae: Morphology, Variability and Function

open access: yesFishes
The single mental barbel is a distinctive feature of the benthic Antarctic fishes of the «cryonotothenioid» subfamily Artedidraconinae. These barbels are unusual because their primary sensory modality is tactility, not chemosensation as in most other ...
Joseph T. Eastman   +2 more
doaj   +1 more source

Effects of macrobenthos on sediment-water oxygen and ammonium fluxes. Final Report. [PDF]

open access: yes, 1997
Sediments are an important location in determining the fate of nutrients entering the estuary. Role of sediments needs to be incorporated into water quality models.
Barnes, J.M.   +3 more
core  

Home - About - Disclaimer - Privacy