Math, asked by barbieharleen425, 8 months ago

फाइंड द स्मालेस्ट नंबर ऑफ 3 डिजिट एक्जेक्टली डिविजिबल बाय 2415 एंड 36​

Answers

Answered by havockarthik30
4

Step-by-step explanation:

Now although the number and variety of birds that migrate has decreased over the last two decades, several foreign species continue to visit National Zoological Park during winters. Previously, almost 5,000 migratory birds spread across more than 10 species used to fly down to the Delhi Zoological Park. But now this number has fallen to an alarming 500-odd birds belonging to hardly five-six species. According to the Zoo’s curator several true migratory birds like Siberian crane, Brahminy duck, Mallard, Red-Crested Pochard and White Stork have not visited the Delhi zoo over the last few years. This decline is due to a number of reasons including atmospheric pollution, hunting by humans, lack of food, global warming etc.

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Local migratory birds also turn up at the Delhi Zoo, and this place becomes a treat to watch for bird lovers. October end and November are the months when the birds start arriving, and more birds are estimated to come by January and February.

STATE WHAT WE KNOW ABOUT THE CHANGING STATE OF BIRDS:

Since the year 1500, we have lost over 150 bird species – an extinction rate far higher than the natural background. Today, one in eight bird species is threatened with global extinction, with 189 species Critically Endangered, and Red List assessments show that things are getting worse. Particularly alarming are sharp declines in many formerly common and widespread species. This is a signal of wider environmental problems, and of the erosion of biodiversity as a whole.

Why birds are declining:irds are declining:

Humans are responsible for the threats to birds. Expanding and intensifying agriculture and forestry destroy and degrade habitats. Inadequately managed fisheries, ever-spreading infrastructure, invasive alien species, pollution and overexploitation all pose serious problems. Climate change, with impacts already visible, may be the most serious threat of all. These threats have deeper causes, rooted in our failure to accord wild nature its true value.

Sound environment:

Over the past few decades, the world’s governments have endorsed many international agreements relevant to the conservation of biodiversity, demonstrating their willingness to cooperate in tackling important environmental issues. The challenge now is to harness this commitment and ensure that concrete actions are taken where they are most needed. In several countries, the engagement of civil society and indigenous peoples’ organisations has resulted in impressive progress. There are signs of increasing action in the private sector, too.

Agriculture and forestry are the key drivers of habitat destruction of birds:

In Africa, habitat clearance for agriculture and logging threatens 50% and 23% of Important Birds Areas (IBAs) respectively. In Europe, agricultural expansion and intensification are among the most serious threats affecting IBAs.

Proportion of IBAs impacted by different classes of threats in Africa and Europe

Analysis of data held in BirdLife’s World Bird Database (2004)

In Africa, habitat clearance for agriculture threatens over 50% of Important Bird Areas (IBAs), with degradation owing to shifting agriculture an additional pressure (Fishpool and Evans 2001). In Europe too, agricultural expansion and intensification are among the most serious threats affecting IBAs, with a high impact at 35% (Heath and Evans 2000). In Africa, selective logging or tree-cutting affects 23% of IBAs, with degradation owing to firewood collection (including charcoal production) and forest grazing being additional, often related pressures (these threats are of less importance in Europe where little old-growth forest remains). In Africa, ongoing or planned infrastructure development (including dam and road building) is a further key cause of habitat destruction, with 21% of IBAs affected. In Europe this is also a major factor affecting IBAs, with a high impact at 37% .

crude and bunker fuels, can cause many problems. Some of these problems are:

disguise of scent that seal pups and mothers rely on to identify each other, leading to rejection, abandonment and starvation of seal pups; and

damage to the insides of animals and birds bodies, for example by causing ulcers or bleeding in their stomachs if they ingest the oil by accident.

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