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Laguna de Bay (Spanish for "Lagoon/Lake of Bay"; Filipino: Lawa ng Bay, ), also known as Laguna Lake and alternatively spelled "Laguna de Bae", [1] is the largest lake in the Philippines. It is located southeast of Metro Manila , between the provinces of Laguna to the south and Rizal to the north.
Studies in Laguna de Bay from 1961 showed its productivity was decreasing. Towards the end of the decade, while overall value increased, this was due to an increase in fish pens. Capture fisheries decreased in productivity, with a small increase in shrimp capture being overshadowed with significant decreases in fish and snail capture.
This is a list of bodies of water by salinity that is limited to natural bodies of water that have a stable salinity above 0.05%, at or below which water is considered fresh. Water salinity often varies by location and season, particularly with hypersaline lakes in arid areas, so the salinity figures in the table below should be interpreted as ...
The largest ocean-based source of plastic pollution is discarded fishing gear (including traps and nets), estimated to be up to 90% of plastic debris in some areas. [56] [57] Continental plastic litter enters the ocean largely through storm-water runoff, flowing into watercourses or directly discharged into coastal waters. [58]
While marine pollution can be obvious, as with the marine debris shown above, it is often the pollutants that cannot be seen that cause most harm.. Marine pollution occurs when substances used or spread by humans, such as industrial, agricultural and residential waste, particles, noise, excess carbon dioxide or invasive organisms enter the ocean and cause harmful effects there.
Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety. [1] Testing may be performed to evaluate: ambient or environmental water quality – the ability of a surface water body to support aquatic ...
This deep-ocean DIC returns to the atmosphere on millennial timescales through thermohaline circulation. Between 1% and 40% of the primary production is exported out of the euphotic zone, which attenuates exponentially towards the base of the mesopelagic zone and only about 1% of the surface production reaches the sea floor. [61] [64] [56]
From shallow waters to the deep sea, the open ocean to rivers and lakes, numerous terrestrial and marine species depend on the surface ecosystem and the organisms found there. [28] The ocean's surface acts like a skin between the atmosphere above and the water below, and harbours an ecosystem unique to this environment.