envis node on marine ecosystem: founder director dr.thrivikramji.k.p

8/14/2019 ENVIS Node on Marine Ecosystem: Founder Director Dr.Thrivikramji.K.P.

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(Estd: AUG. 2002)

Department of Geology

University of Kerala

Kariavattom 695 581Director: Prof. Thrivikramji.K.P.


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WEBSITE ON MARINE-ECOSYSTEM

NEWSLETTER ON MARINE-ECOSYSTEM

IDENTIFICATION OF DATA GAPS

DATABASE ON WEBSITECONTRIBUTION TO ENVIS NEWSLETTER

ESTABLISH CLEARING HOUSE

LINKAGES WITH CLIENT USERS


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WEBSITE CREATED READY TO UPLOADIN JAN. 2003

FIRST NEWSLETTER RELEASED

DATABASE ON TRACK AND ON

SCHEDULE


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CATALOGUED

78 Ph.D theses of Dept. Aquatic Biology& Fisheries, University of Kerala

271 reprints24 M.Phil Dissertations

Bibliography with abstracts 414 (Year

2001)Bibliography with abstracts 500 from1838 1938


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First Newsletter on Marine Ecosystem


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1. IBM ThinkPad Rs. 1.25 Lakhs

2. Hand Held Scanner Rs. 25,000

RELEASE OF FUND INSTALLMENTSBASED ON CA S AUDIT REPORT.


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A New Frontier Under Siege - A Profile


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Cover 71% of Earth s surface

play key roles in the survival of virtually alllife on Earth.

Distributes solar heat.

Maintains the hydrologic cycleRegulates earth s climate


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gigantic reservoir of carbon dioxide - regulatetemperature of troposphere.

home for ~ 250,000 species of marine plants

and animals - food for many other organisms,including humans

warehouse of iron, sand, gravel, phosphates,magnesium, oil, natural gas.

great buffer.


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1. The Coastal Zone

Relatively warm; nutrient-rich; shallow

water- extends from high-tide mark onland to gently shallow continental shelf

Makes up 10% of ocean s area, coastalzone=90% of all marine species & site oflarge commercial marine fisheries


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Coastal zone -shallow;ample supply ofsunlight and plantnutrients-deposits

terrigenous - stirred bywind, waves, tides andcurrents.

High primary productivity


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Estuaries:Coastal areas at mouths of rivers

- fresh water with fertile silt &mix with salty seawater.

Lots of nutrients available toproducers.


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Coastal land covered withsalt water.

Excellent breeding groundsand habitats for waterfowl &

wildlife.

Recreational sites


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Protect quality of coastal water by diluting,filtering, settling out sediments, excess

nutrients, and pollutants.Buffer shore property from storms.

Serve as nurseries play-pens for shrimps,

aquatic animals


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Part of coastal zone

Tropical andsubtropical oceans

World s oldest andmost diverseproductive ecosystems

- marine equivalent oftropical rainforest.


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Sharp increase in water depth at the edge

of continental shelf; separates the coastalzone from open sea.

Contains 10% of all marine species

Open sea divided into 3 vertical zonesbased primarily on penetration ofsunlight.

euphotic, bathyal, abyssal zones

2. THE OPEN SEA


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Euphotic zone: light - photosynthesisoccurs here. (coastal zone - all euphotic)

Bathyal zone: dimly lit

Abyssal zone= dark; found only in open sea


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Supports large populations of floating &drifting producers= phytoplanktons

(cyanobacteria; protists)Phytoplanktonsfed upon by largerzooplanktons (single-celled to jellyfish)

Variety of consumers feed on these -from

baleen whales to herrings, anchovies.


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Dead and decaying organisms fall to theocean floor - feed decomposers &scavengers - crabs & sea urchins

Open sea - average primary productivityquite low.

Because sunlight can t penetrate the

lower layers - though somechemosynthesis is used by some bacteria.


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Oil drilling is theenemy of

marine diversitybut actuallysmall impact


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Overexploitatione.g. Grouper

Incidental tofishing e.g. turtles;dolphins


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If looked at oldgrowth forest in

Pacific North westgood biodiversity

if eliminate

structuralcomplexitydestroy biodiversity


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Trawling catches lots of

bycatches 95% notshrimp (trawl trashbiodiversity )-- Only 5%

are shrimp

Leave long lastingdestruction on thebottom very similar toclear cutting


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Forest loss worldwide is approximately

100, 000 km2 Area trawled is equal to

14.8 million km2

Sport fishermen and fishing industry

biggest opponent


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envis node on marine ecosystem: founder director dr.thrivikramji.k.p

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