REMOTE SENSING OF BIOGEOPHYSICAL FACTORS INFLUENCING LOCAL WATER QUALITY AND CORAL REEF HEALTH, U.S. VIRGIN ISLANDS

2017 ◽  
Author(s):  
Hannah L. Schlaerth ◽  
◽  
Dulci Avouris ◽  
David Flanagan ◽  
Marilyn E. Brandt ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Coral Reef ◽  
Virgin Islands ◽  
Factors Influencing ◽  
Reef Health ◽  
Local Water

scholarly journals Coral reef health response to chronic and acute changes in water quality in St. Thomas, United States Virgin Islands

2016 ◽  
Vol 111 (1-2) ◽  
pp. 418-427 ◽  
Author(s):  
Rosmin S. Ennis ◽  
Marilyn E. Brandt ◽  
Kristin R. Wilson Grimes ◽  
Tyler B. Smith
Keyword(s):  
United States ◽  
Water Quality ◽  
Coral Reef ◽  
United States Virgin Islands ◽  
Virgin Islands ◽  
Health Response ◽  
Reef Health ◽  
Acute Changes

Hyperspectral Remote Sensing and Radiative Transfer Simulation as a Tool for Monitoring Coral Reef Health

2002 ◽  
Vol 36 (1) ◽  
pp. 4-13 ◽  
Author(s):  
Hiroya Yamano ◽  
Masayuki Tamura ◽  
Yoshimitsu Kunii ◽  
Michio Hidaka
Keyword(s):  
Remote Sensing ◽  
Coral Reef ◽  
Radiative Transfer ◽  
Feasibility Studies ◽  
Hyperspectral Remote Sensing ◽  
Hyperspectral Data ◽  
Dead Coral ◽  
Hyperspectral Sensors ◽  
Reef Health ◽  
Radiative Transfer Modeling

Recent advances in the remote sensing of coral reefs include hyperspectral remote sensing and radiative transfer modeling. Hyperspectral data can be regarded as continuous and the derivative spectroscopy is effective for extracting coral reef components, including sand, macroalgae, and healthy, bleached, recently dead, and old dead coral. Radiative transfer models are effective for feasibility studies of satellite or airborne remote sensing. Using these techniques, we simulate and analyze the apparent reflectance of coral reef benthic features associated with bleaching events, obtained by hyperspectral sensors on various platforms (ROV, boat, airplane, and satellite), and suggest that the coral reef health on reef flats can be discriminated precisely. Remote sensing using hyperspectral sensors should significantly contribute to mapping and monitoring coral reef health.

Assessing coral reef health across onshore to offshore stress gradients in the US Virgin Islands

2008 ◽  
Vol 56 (12) ◽  
pp. 1983-1991 ◽  
Author(s):  
T.B. Smith ◽  
R.S. Nemeth ◽  
J. Blondeau ◽  
J.M. Calnan ◽  
E. Kadison ◽  
...  
Keyword(s):  
Coral Reef ◽  
Virgin Islands ◽  
Us Virgin Islands ◽  
Stress Gradients ◽  
The Us ◽  
Reef Health

scholarly journals The coral reef health at surrounding blue swimming crab fishery sites in Mandangin Island, East Java, Indonesia

2021 ◽  
Vol 944 (1) ◽  
pp. 012021
Author(s):  
I Ardiansah ◽  
S A Hidayat ◽  
D F D Mutmainah ◽  
M C B Siahaan ◽  
M R Firdaus ◽  
...  
Keyword(s):  
Water Quality ◽  
Coral Reef ◽  
Coral Cover ◽  
Quality Data ◽  
Swimming Crab ◽  
Health Index ◽  
Underwater Visual Census ◽  
Water Quality Data ◽  
Reef Health ◽  
Coral Health

Abstract Blue swimming crab fishery activities very often do not put into account the environmental condition. Coral reef, as one of the blue swimming crab habitats, can be affected by these activities. This study aims to determine the effect of blue swimming crab fisheries on coral health in Mandangin Island, East Java, Indonesia. Data collection points are determined based on the results of interviews by participatory mapping. Water quality data includes visibility, temperature, salinity, pH, DO, current velocity. Collecting coral reef data were using Line Intercept Transect (LIT), while for reef fish Underwater Visual Census (UVC) were used. The coral health index was determined based on the relevance between benthic components and fish components. The average of Mandangin Island’s water quality is in accordance with the quality standards of the Indonesian Minister of Environment Decree No.51 of 2004. Hard coral cover and fish biomass are classified as low, but the value of resilience is high. The coral reef health index value on Mandangin Island is 3.

Factors influencing the structure of macroinvertebrate communities in subarctic lakes affected by wildfires

2020 ◽  
Author(s):  
Thomas James Pretty ◽  
Charles-Matthew Chanyi ◽  
Catherine Kuhn ◽  
Derek K. Gray
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Boreal Forest ◽  
Trophic Levels ◽  
Natural Phenomenon ◽  
Field Observations ◽  
Macroinvertebrate Communities ◽  
Subarctic Lakes ◽  
Factors Influencing ◽  
Invertebrate Composition

Fires are a natural phenomenon in the boreal forest, but their frequency is expected to increase over the coming century. Fires may affect water quality and invertebrates in lakes, but there have been few studies in the northern boreal forest to describe these impacts. We collected data on water quality, macrophytes, and invertebrates from 20 lakes in the Sahtú Settlement Area of the Northwest Territories. Nine lakes were affected by fires in their catchments 4-5 years before data collection, while eleven were not. Our results showed that few water quality variables were associated with fires. However, remote sensing and field observations suggested that macrophyte biomass was higher in lakes affected by burns and this variable was a significant predictor of invertebrate composition. Burn history was an important predictor of the richness and abundance of invertebrates, but natural variability in lake properties was more important for explaining differences among lakes. Our results suggest that a better understanding of the effects of wildfires might be gained by examining how post-fire changes in macrophytes affect other trophic levels.

Monitoring land use change in the Lake Taupo catchment between 1975, 1990 and 2002 using satellite remote sensing data

2007 ◽  
pp. 17-22
Author(s):  
H. Lilienthal ◽  
A. Brauer ◽  
K. Betteridge ◽  
E. Schnug
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Land Use ◽  
Land Use Change ◽  
Satellite Remote Sensing ◽  
Remote Sensing Data ◽  
Native Vegetation ◽  
Lake Water Quality ◽  
Livestock Farming ◽  
Slow Decline

Conversion of native vegetation into farmed grassland in the Lake Taupo catchment commenced in the late 1950s. The lake's iconic value is being threatened by the slow decline in lake water quality that has become apparent since the 1970s. Keywords: satellite remote sensing, nitrate leaching, land use change, livestock farming, land management

Spatial Pattern of Water Quality on Coral Reef Area Around Kaledupa Island

Jurnal Segara ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 99
Author(s):  
Hadiwijaya Lesmana Salim ◽  
Dini Purbani ◽  
Agustin Rustam ◽  
Yulius Yulius ◽  
Devi Suryono ◽  
...  
Keyword(s):  
Water Quality ◽  
Coral Reef ◽  
Spatial Pattern ◽  
Reef Area ◽  
Coral Reef Area
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