Results 71 to 80 of about 66,140 (200)

Nutrient and Coliform Levels in the Surface Waters of a Protected Upland Lake in Ormoc City Philippines

open access: yesEnvironment and Natural Resources Journal
Lake Danao in OrmocCity, Philippines, is a legally protected freshwater ecosystem classified as a Class A water body by the government.
Eugie V. Cinco   +3 more
doaj   +1 more source

Comparative studies of underwater light regimes in lakes of the East-Suwałki Lakeland

open access: yesLimnological Review, 2016
Secchi disc transparency and optical properties of water, based on measurements for downward irradiance using an underwater radiometer PER-700, were studied in 23 lakes of the Suwałki Landscape Park (SLP) in 2013.
Borowiak Dariusz, Borowiak Magdalena
doaj   +1 more source

Assessment of the water quality of ten Waikato lakes based on zooplankton community composition. CBER Contract Report No. 60

open access: yes, 2007
Zooplankton communities were documented from ten Waikato lakes from net haul samples collected in late 2006 and from species hatched from diapausing eggs in sediments collected in early 2007.
Duggan, Ian C.
core  

A multivariate assessment of the trophic state of a man-made reservoir in North Tunisia

open access: yesLimnological Review, 2013
In the present work, we attempt to test the applicability of common trophic state indices such as Carlson’s index (1977), probability distribution diagrams of Vollenweider (1982), and fixed boundary systems of the OECD (1982) and of Nurnberg (1996) for ...
Aloui Besma Zouabi, Gueddari Moncef
doaj   +1 more source

Estimation of Chlorophyll-a Concentration from Optimizing a Semi-Analytical Algorithm in Productive Inland Waters

open access: yesRemote Sensing, 2018
The high nutrient concentrations coming from non-point and point pollution have been linked to algae blooms, especially in hydroelectric plant reservoirs, due to higher residence time compared to rivers.
Fernanda Watanabe   +4 more
doaj   +1 more source

Landsat Trophic State Assessment of Fellows Lake

open access: yes, 1986
The use of LANDSAT remote sensing techniques for monitoring trophic state at Fellows Lake is examined. Data is obtained for ten individual scene days (thrity sample sites) covering a two year period.
Krizanich, Gary W.
core  

Trophic assessment of streams in Uruguay: A Trophic State Index for Benthic Invertebrates (TSI-BI)

open access: yesEcological Indicators, 2011
Abstract Human activities are radically changing natural land cover and increasing the delivery of soil, organic compounds, nutrients, toxic agrochemicals and other contaminants to aquatic ecosystems. The eutrophication of streams, rivers, lakes, reservoirs and costal zones is one of the most important consequences of human activities.
Guillermo Chalar   +3 more
openaire   +1 more source

An ecosystem model of San Pedro Bay, Leyte, Philippines: initial parameter estimates [PDF]

open access: yes
A mass-balance model of the trophic structure of San Pedro Bay, Leyte Province, Philippines was constructed using the Ecopath modeling software. The model is composed of 16 ecological groups (13 consumer, 2 producers, 1 detritus groups).
Campos, W.L.
core  

Trophic state and geographic gradients influence planktonic cyanobacterial diversity and distribution in New Zealand lakes

open access: yes, 2017
Cyanobacteria are commonly associated with eutrophic lakes, where they often form blooms and produce toxins. However, they are a ubiquitous component of phytoplankton in lakes of widely varying trophic status.
Puddick, Jonathan   +15 more
core   +1 more source

URRENT STATE OF THE ECOSYSTEM OF LAKE UROZERO, KARELIA, ASSESSED THROUGH PRIMARY PRODUCTION AND DESTRUCTION INDICATORS

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2019
Lake Urozero has the status of a regional-level state hydrological nature monument in the Republic of Karelia. Up until the mid-2000’s, the lake have been noted for very high water transparency and the ultra-oligotrophic state of the ecosystem.
Elena Tekanova
doaj   +1 more source

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