6.1 How does species diversity affect the sustainability of a community?

what is species diversity?
what is community? collection of populations of different species.
community characteristic
species and its interaction (feeding relationship)
species diversity- species richness and species evenness
niche structure-how many ecological nithes, how they resemble or different from one another, and how the species occupying different niches interact.
the most species-rich environments are
tropical rain forests,
coral reefs,
the ocean bottom zone, and
large tropical lakes.

Sustainability involves resisting or responding to changing environmental conditions
永續與穩定的三個面向
1.inertia or persistence 惰性
2.constancy恆定性
3.resilience回復
science focus
tropical rain forests vs. grasslands

species-rich communities tend to be productive and sustainable
theory and hypotheses
a species-rich community better able to recover or bounce back?
how much species diversity species richness is needed, still uncertain.
ecological roles play(6.2)

feeding relationship攝食關係
species diversity
species richness種的數目或豐富度
species evenness種的均勻度
nitch structure
resemble像,類似
severe嚴重的;劇烈的
three aspects of stablility or sustainablility in living system
inertia慣性;慣量;惰性
constancy恆久不變
resilience恢復力
bounce彈回
drought乾旱