Examkin

Soru

Zorluk: OrtaBiodiversity Concepts, Hotspots and Endemism

Assess the fundamental criteria for global biodiversity hotspots, spatial diversity metrics, and regional species endemism. Which of the following statements are correct?

  1. To qualify as a global biodiversity hotspot under the Norman Myers framework, a region must have lost at least 70% of its original primary native vegetation.Cevap
  2. The Nicobar group of islands in India is biogeographically classified under the Sundaland biodiversity hotspot rather than the Indo-Burma hotspot.Cevap
  3. C
    Beta diversity quantifies the species richness observed within a single, uniform local ecosystem or homogeneous community.
  4. D
    The Sangai deer (Rucervus eldii eldii) is a critically endangered mammal endemic to the tropical rainforests of the Western Ghats hotspot.

Cevap

The correct statements are the assertion regarding Norman Myers' hotspot habitat loss threshold of 70% and the statement classifying the Nicobar Islands under the Sundaland hotspot.
The valid statements correctly highlight Norman Myers' classic hotspot criterion (a minimum 70% loss of primary vegetation) and accurately map the Nicobar Islands to the Sundaland biodiversity hotspot.

Adım Adım Çözüm

1
Evaluate the quantitative threshold for biodiversity hotspots
Norman Myers established two strict criteria: containing at least 1,500 endemic vascular plant species and having lost at least 70% of original primary habitat. Thus, the statement regarding 70% vegetation loss is correct.
Hotspot designation relies on high endemism combined with severe habitat threat.
2
Verify the biogeographical classification of Indian island territories
The Andaman Islands belong to the Indo-Burma hotspot, while the Nicobar Islands extend into the Sundaland hotspot. Thus, the statement regarding the Nicobar Islands' location in Sundaland is correct.
Administrative units of India cross distinct global biodiversity hotspots.
3
Differentiate between alpha, beta, and gamma diversity metrics
Alpha diversity measures local species richness within a single site. Beta diversity assesses species turnover between habitats across a gradient. The statement defining local richness as beta diversity is incorrect.
Whittaker's diversity metrics categorize spatial scales of biodiversity distinctly.
4
Analyze the geographical range and habitat of the Sangai deer
The Sangai (Brow-antlered deer) is naturally confined to the phumdis of Keibul Lamjao National Park in Manipur, placing it in the Indo-Burma region rather than the Western Ghats. The statement locating it in the Western Ghats is incorrect.
Endemic species must be correctly associated with their specific regional hotspots.

Anahtar Kavram

Biodiversity Hotspot Criteria, Endemic Species Distribution, and Ecological Diversity Indices
Bu soruyu puanla

Konular

Biodiversity Concepts, Hotspots and Endemism

Bu konudan daha fazla soru