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#ecological study

2 public questions tagged with this topic.

Which field method uses long rectangular plot?

Quadrat methods employ square plots for sessile organisms, while transect approach samples along environmental gradient like altitude or moisture. Line transect specifically uses long rectangular belt often tens or hundreds of meters length with limited width to record species occurring along line and estimate density and distribution changes. Grid mapping overlays systematic squares for territory mapping, radar survey uses remote electromagnetic waves. Long rectangular design allows efficient interception of mobile animals and transition zones, generating encounter rates and percent cover dat

Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.

Which study supported diversity-stability hypothesis through drought resistance?

Tilman and Downing used long-term grassland data to show that more diverse plant communities were more resistant to drought and recovered more strongly. Their result connected species richness with stability of community biomass under climatic stress. Biodiversity–function hypotheses differ in how they assign ecological importance among species. Complementarity emphasizes distinct contributions, redundancy emphasizes overlap and compensation, rivet theory emphasizes cumulative weakening, keystone theory emphasizes particular influential species, and idiosyncrasy emphasizes context dependence.

Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation