Environment

Global Warming

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  • An increase in the average temperature of Earth’s near surface air and oceans since the mid-20th century
  • 4th assessment report of IPCC: global temperature increased 74+0.18 degree C during the 20th century.
  • Caused by greenhouse gases
  • Since the industrial revolution, the burning of fossil fuels has increased the levels of Co2 in the atmosphere from 280 ppm to 390 ppm.

Aquatic Zones

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Aquatic systems are not called biomes,

The major differences between the various aquatic zones are due to salinity, levels  of dissolved nutrients; water temperature, depth of sunlight penetration.

 

  1. Fresh Water Ecosystem-Fresh water ecosystem are classified as lotic

(moving water) or lentic

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(still or stagnant water).

 

  1. Marine Ecosystem-
  2. Estuaries-Coastal bays, river mouths and tidal marshes  form  the

estuaries.  In estuaries, fresh water from rivers meet ocean water and the two are mixed by action of tides.

Estuaries are highly productive as compared to the adjacent river or sea

GRASSLAND ECOSYTEM

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found where rainfall is about 25-75 cm per year, not enough to support a forest, but more than that of a true desert.

vegetation formations that are generally found in temperate climates.

In India, they are found mainly in the high Himalayas. The rest of India’s grasslands aremainly composed of steppes and savannas.

Steppe formations occupy large areas of sandy and saline soil; in western Rajasthan, where the climate is semi-arid,

The major difference between steppes and savannas is that all the forage in

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the steppe is  provided only during the brief wet season whereas in the savannas forage is largely from grasses that not only grow during the wet season but also from the  smaller amount of regrowth in the dry season.

 

Types of Grasslands

  1. semi-arid zone (The Sehima-dichanthium type)

It covers the northern portion of Gujarat, Rajasthan (excluding Aravallis), western Uttar Pradesh, Delhi and Punjab.

The topography is broken up by

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hill spurs and sand dunes.

senegal, Calotropis gigantia, Cassia auriculata, Prosopis cineraria, Salvadora oloides and zizyphus Nummularia which make the savanna rangeland look like scrub.

  1. dry sub humid zone (The Dichanthium- cenchrus-lasitrrus type)

It covers the whole of peninsular India (except Nilgiri).

The thorny bushes are Acacia catechu, Mimosa, Zizyphus (ber) and sometimes fleshy Euphorbia, along with low trees of Anogeissus latifolia, Soymida febrifuga and other deciduous species.

Sehima (grass)is more prevalent on gravel and the cover maybe 27%. Dichanthium (grass) flourishes on level soils and may cover 80% of the ground.

3)  moist subhumid zone(The Phragmities- sacchrum-imperata type)

It covers the Ganga alluvial plain in Northern India.

The topography is level, low lying and ill-drained.

Bothriochloa pertusa, Cypodon dactylon and     Dichanthium annulatum are found in transition zones.

The common trees and shrubs are Acacia arabica, hogeissus, latifolia, Butea monosperma,

Phoenic sylvestris and Zizyphus nummularia.

Some of these are replaced by Borassus sp in the palm savannas especially near Sunderbans.

4) The Themeda – Arundinella type

This extends to the humid montane regions and moist sub-humid axeas of Assam, Manipur,West Bengal, Uttar Pradesh, Punjab, Himachal Pradesh and. Jammu and Kashmir.

The savanna is derived from the humid forests on account of shifting cultivation and sheep grazing.

Indian Grasslands and Fodder Research Institute, Jhansi and Central Arid Zone Research institute, Jodhpur

Role of fire

fire plays, an important role in the management  of grasslands.

Under moist conditions fire favours grass over trees, whereas in dry conditions fire is often necessary to maintain grasslands against the invasion of desert shrubs.

Burning increases the forage yields, e.g. Cynodon daotylon

GRASSLAND ECOSYTEM

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found where rainfall is about 25-75 cm per year, not enough to support a forest, but more than that of a true desert.

vegetation formations that are generally found in temperate climates.

In India, they are found mainly in the high Himalayas. The rest of India’s grasslands are mainly composed of steppes and savannas.

Steppe formations occupy large areas of sandy and saline soil; in western Rajasthan, where the climate is semi-arid,

The major difference between steppes and savannas is that all the forage in the steppe is  provided only during

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the brief wet season whereas in the savannas forage is largely from grasses that not only grow during the wet season but also from the  smaller amount of regrowth in the dry season.

 

Types of Grasslands

  1. semi-arid zone (The Sehima-dichanthium type)

It covers the northern portion of Gujarat, Rajasthan (excluding Aravallis), western Uttar Pradesh, Delhi and Punjab.

The topography is broken up by hill spurs and sand dunes.

senegal, Calotropis gigantia, Cassia auriculata, Prosopis cineraria, Salvadora oloides and zizyphus Nummularia which make the savanna rangeland look like scrub.

  1. dry sub humid zone (The Dichanthium- cenchrus-lasitrrus type)

It covers the whole of peninsular India (except Nilgiri).

The thorny bushes are Acacia catechu, Mimosa, Zizyphus (ber) and sometimes fleshy Euphorbia, along with low trees of Anogeissus latifolia, Soymida febrifuga and other deciduous species.

Sehima (grass)is more prevalent on gravel and the cover maybe 27%. Dichanthium (grass) flourishes on level soils and may cover 80% of the ground.

3)  moist subhumid zone(The Phragmities- sacchrum-imperata type)

It covers the Ganga alluvial plain in Northern India.

The topography is level, low lying and ill-drained.

Bothriochloa pertusa, Cypodon dactylon and     Dichanthium annulatum are found in transition zones.

The common trees and shrubs are Acacia arabica, hogeissus, latifolia, Butea monosperma,

Phoenic sylvestris and Zizyphus nummularia.

Some of these are replaced by Borassus sp in the palm savannas especially near Sunderbans.

4) The Themeda – Arundinella type

This extends to the humid montane regions and moist sub-humid axeas of Assam, Manipur,West Bengal, Uttar Pradesh, Punjab, Himachal Pradesh and. Jammu and Kashmir.

The savanna is derived from the humid forests on account of shifting cultivation and sheep grazing.

Indian Grasslands and Fodder Research Institute, Jhansi and Central Arid Zone Research institute,

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Jodhpur

Role of fire

fire plays, an important role in the management  of grasslands.

Under moist conditions fire favours grass over trees, whereas in dry conditions fire is often necessary to maintain grasslands against the invasion of desert shrubs.

Burning increases the forage yields, e.g. Cynodon daotylon

Biosphere

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Biosphere is a part of the earth where life can exist.

represents a highly integrated and interacting zone comprising of atmosphere (air), hydrosphere (water) and lithosphere (land) Life in the biosphere is abundant between 200 metres (660 feet) below the surface of the ocean and about 6,000

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metres (20,000 feet) above sea level. absent at extremes of the North and South poles. Living organisms are not uniformly distributed  throughout the biosphere

Waste minimization

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Waste minimization is an appropriate strategy to address the problems of industrial pollution. The objective of the scheme is to assist the small and medium scale industries in adoption of cleaner production processes.

• A scheme on adoption of clean technology and promotion and establishment of waste minimization circles in small and medium scale industries is being implemented at the initiative of Ministry of Environment & Forests.
• So far, 118

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waste Minimisation Circles have been established in 41 sectors in 17 geographic locations in the country.
• A “Waste Minimization Circle (WMC)” is a small group (5
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to 7 units) of entrepreneurs in the small scale sector, whose units manufacture similar products and employ the same processes voluntarily meeting periodically and regularly in the premises of each member unit, one after another, to analyze the current operations of the host unit.

31.01.18 Arunachal Pradesh(APPSC) Current Affairs

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NORTH-EASTERN STATES

  • Nagaland receives no instruction from EC

 

  • Nagaland state election authority has not received any instruction from the Election Commission 24 hours after all major political parties agreed not to contest the upcoming assembly polls slated for February 27 alleging the Centre’s failure to resolve the main political problem.

 

  • According to state election department sources, the authority was aware of the decision and they passed the message to the ElectionCommission.

 

  • Many political functionaries in Kohima callerstate chief election officer Abhijeet Sinha on Tuesday who said that they won’t halt the process until they receive any instruction from the country’s poll panel which announced the poll scheduled two weeks back.

 

  • All major political parties on Monday signed a joint statement prepared by the civil society organizations not to contest the polls without a complete solution of the vexed decade old problem.

 

 

INTERNATIONAL

 

  • India and Asian Development Bank (ADB) sign $250 Million Loan

 

  • The Asian Development Bank (ADB) and the Government of India have signed a $250 million loan to finance the construction of 6,254 kilometers all-weather rural roads in the States of Assam, Chhattisgarh, Madhya Pradesh, Odisha and West Bengal under the Prime Minister’s Rural Roads Program (PMGSY).

 

  • The First Tranche Loan is part of the $500 million Second Rural Connectivity Investment Program for India approved by the ADB Board in
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    December 2017.

 

  • The program is aimed at improving rural connectivity, facilitating safer and more efficient access to livelihood and socio-economic opportunities for rural communities through improvements to about 12,000 kilometers Rural Roads across the 5 States.

 

·        India Ranks 6th In The List Of Wealthiest Countries

 

  • India ranked sixth in the list of wealthiest countries with the total wealth of 8,230 billion US dollars.
  • The list was topped by the United States of America, according to a report by New World Wealth.
  • He was the best-performing wealth market globally in 2017 as its total wealth swelled from 6,584 billion dollars in 2016 to 8,230 billion dollars in 2017, registering a 25% growth.

 

 

  • India ranks 62th in inclusive development index by World Economic Forum

 

Inclusive Development Index

 

  • 103 countries
  • 74 –developing countries
  • India ranked 62th
  • Three individual pillars — growth and development; inclusion; and inter-generational equity — has been divided into two parts. The first part covers 29 advanced economies and the second 74 emerging economies.

 

  • Growth score (6 level)— receding, slowly receding, stable, slowly advancing and advancing.

 

  • The top-five most inclusive emerging economies are Lithuania, Hungary, Azerbaijan, Latvia and Poland.

 

  • India ranks 72nd for inclusion, 66th for growth and development and 44th for inter-generational equity.

 

  • Three parameters -Standard of living-  Environment stability – future generation indebtedness

 

  • India is above only from South africa in BRICS countries.

 

NATIONAL

 

·        India becomes third largest producer of crude steel

 

  • According to a recent report published by World Steel Association (WSA), India overtook
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    the US to become the world’s third-largest steel producer in 2018.
  • China has remained world leader by producing 831.7 MT in 2017, up 5.7% from 786.9 MT in the year-ago period.
  • Japan is second largest global steel producer.
  • The Global steel production had reached 1,691.2 MT in 2017, up by 5.3% compared to 2016 when output was 1,606.3 MT.
  • It includes over 160 steel producers with 9 of the 10 largest steel companies, national and regional steel industry associations, and steel research institutes.
  • It was founded in July 1967 and is headquartered in Brussels, Belgium.

 

  • Stree Swabhiman Initiative launched for Women Health and Hygiene

 

  • The Information Technology and Electronics Ministry of the country has announced to launch the new scheme initiative under Stree Swabhiman Drive.

  • The new initiative has been introduced by the Ministry and CSC to ensure and maintain perfect health for Women and at the same time to maintain Health Hygiene.

 

  • Prime Minister to launch Khelo India School Games in the Capital

 

  • Prime Minister Shri Narendra Modi will launch the first Khelo India School Games at Indira Gandhi Indoor Stadium in New Delhi on January 31, 2018.

 

  • The Khelo India programme has been introduced to revive the sports culture in India at the grass-root level by building a strong framework for all sports played in our country and establishing India as a great sporting nation.

 

  • Talented players identified in priority sports disciplines at various levels by a High-Powered Committee will be provided annual financial assistance of Rs. 5 lakh per annum for 8 years.

 

  • The Khelo India School Games are being held from 31st January to 8th February, 2018 in New Delhi.

 

  • It is being implemented in 150 Colleges and 20 Universities.

 

  • Under-17 athletes have been invited to participate across 16 disciplines.

 

·        India to witness super blue moon with lunar eclipse

  • India would witness a ‘super blue blood‘ moon between 5:15 PM and 7:37 PM on as the Moon goes from east to west.
  • Occurring for the first time since 1866, the second Full Moon of the month, often called a Blue Moon, would coincide with a lunar eclipse giving it a blood-red tint, with the Moon also being a supermoon.

 

·        Indian Navy launches third Scorpene class submarine Karanj

 

  • The Indian Navy launched ‘Karanj,’the third Scorpene class submarine.
  • The submarine, constructed by shipbuilder Mazagon Dock Limited (MDL)in Mumbai.
  • The first of the six Scorpene-class submarines, Kalvari, was commissioned into the Indian Navy by Prime Minister Narendra Modi last month.
  • He had called its induction a big step in the country’s defense preparedness.
  • On the occasion, Defence Minister Nirmala Sitharaman had called submarine building a sophisticated and exacting craft, which only a handful of countries possess in their industrial capacity.

 

  • The second one, INS Khandari, was launched on January 12 this year is currently undergoing sea trials.

 

  • The Scorpene submarines are a primary modernization requirement of the Indian Navy, which is currently faced with an ageing submarine fleet, and that too when the Chinese navy has a growing presence in the Indian Ocean.

 

  • The technology being used for construction of the Scorpene class submarines has ensured superior stealth features such as advanced acoustic silencing techniques, low radiated noise levels and hydrodynamically optimized shape. These stealth features give it an invulnerability, unmatched by most submarine.

 

·        Environment Minister Harshvardhan Launches PetaFlop Super Computer

 

  • Environment Minister Harshvardhan launched a 8 PetaFlop capacityhigh-performance computer system ‘Mihir’ in Noida.
  • The system will be able to predict weather and climate accurately. This will be helpful in addressing the various issues of agriculture operations and fishing in the country.
  • The system will help the department in predicting severe climate-related calamities and warnings for fishermen.
  • With the launch of the system, India has joined the elite 30 member group of countries which have this advanced technology.

MANGROVES

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Mangroves are the characteristic littoral plant formation of tropical and subtropical sheltered coastlines.

are trees and bushes growing below the high water level of spring tides which exhibits remarkable capacity for salt water tolerance.

basically evergreen land plants growing on sheltered shores, typically on tidal flats, deltas, estuaries, bays, creeks and the barrier islands. require high solar radiation and have the ability to absorb fresh water from saline/ brackish water. produces pneumatophores (blind roots) to overcome respiration problem in the anaerobic soil conditions

  • Leaves are thick and
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    contain salt secreting glands.
  • exhibit viviparity mode of reproduction. i.e. SeedS germinate in the tree itself (before falling to the ground). This is an adaptative medianiSintoovercome the problem of germination in Saline water.
  • crystals of salt on the
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    back of the leaves; others block absorption of salt at their roots

The mangroves of Sundarbans are the largest single block of tidal holophytic mangroves of the world. famous for the Royal Bengal Tiger and crocodiles.

The mangroves of Bhitarkanika (Orissa), which is the second largest in the Indian sub continent, harbour high concentration of typical mangrove species and high genetic diversity have (additional) special roots such as prop roots, pneumatophores  which help to impede water flow and thereby enhance the deposition of sediment in areas (where it is already occurring), stabilize the coastal shores, provide breeding ground for fishes. protects coastal lands from tsunami, hurricanes:and floods release oxygen back to the atmosphere, along with a little methane gas

Biomes and Its types

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Biome

The terrestrial part of the biosphere is divisible into enormous regions called biomes, which are characterized, by climate, vegetation, animal life and general soil type.

No two biomes are alike.

The most important climatic factors are temperature and precipitation.

  1. Tundra- Northern most region  adjoining the ice bound  poles. Devoid of trees except stunted shrubs in the southern part of tundra biome, ground flora includes lichen, mosses and sedges.

The typical animals are reindeer, arctic fox polar bear, snowy owl, lemming, arctic hare,  ptarmigan. Reptiles and amphibians are almost absent

 

  1. Taiga- Northern Europe, Asia and North America. Moderate temperature than tundra. Also known as boreal forest.

The dominating vegetation is coniferous evergreen mostly spruce, with some pine and firs. The fauna consists of small seed eating birds, hawks, fur bearing carnivores, little mink, elks, puma, Siberian tiger, wolverine, wolves etc.

 

  1. Temperate Deciduous Forest- Extends over Central and Southern Europe, Eastern North America, Western China, Japan, New
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    Zealand etc.

Moderate average temperature and abundant  rainfall. These are generally the  most  productive agricultural areas of the earth The flora includes trees like beech, oak, maple and cherry. Most animals are the familiar vertebrates and invertebrates.

  1. Tropical rain forest- Tropical areas  in  the equatorial regions, which is  a bound  with  life.  Temperature and rainfall high.

Tropical rainforest covers about 7% of the earth’s surface & 40% of the world’s plant and animal species.

Multiple storey of broad-leafed evergreen tree species are in abundance.

Most animals and epiphytic plants(An epiphyte is a plant that grows harmlessly upon another plant)  are concentrated in the canopy

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or tree top zones

  1. Savannah- Tropical region: Savannah is most extensive in Africa

Grasses with scattered trees and fire resisting thorny shrubs.

The fauna include a great diversity of grazers and browsers such as antelopes, buffaloes, zebras, elephants and rhinoceros;  the carnivores include lion, cheetah, hyena; and mongoose, and many rodents

 

  1. Grassland- North America, Ukraine, etc . Dominated by grasses. Temperate conditions with rather low rainfall. Grasses dominate the vegetation. The fauna include large herbivores like bison, antelope, cattle, rodents, prairie dog, wolves, and a rich and diverse array of ground nesting bird

 

  1. Desert- Continental interiors with very low and sporadic rainfall with low humidity. The days are very hot but nights are cold. The flora is drought resistance vegetation such as cactus, euphorbias, sagebrush. Fauna : Reptiles, Mammals and birds.

India’s action against Desertification

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India as a signatory to United Nations Convention to Combat Desertification (UNCCD) has submitted four National Reports to UNCCD  in the years 2000, 2002, 2006 and 2010

Some of the major programmes currently implemented that address issues related

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to land degradation and desertification is:-

  1. Integrated Watershed Management Programme (IWMP),
  2. National Afforestation Programme (NAP),
  3. National Mission for Green India (GIM),
  4. The Mahatma Gandhi National Rural Employment Guarantee Scheme
  5. (MGNREGS),
  6. Soil Conservation in the Catchment of River Valley Project and Flood Prone River,
  7. National Watershed Development Project for Rainfed Areas (NWDPRA),
  8. Desert Development Programme (DDP)
  9. Fodder and Feed Development Scheme-component of Grassland Development including
  10. Grass Reserves, Command Area Development and Water Management (CADWM)  programme etc