Question

When energy is transferred from one trophic level to another, how much is typically lost? 10% 50% 90% 30% The maximum number of individuals that an area can support is called resource partitioning carrying capacity logistic growth exponential growth Seastars decrease species richness in intertidal zones of the Pacific northwest. True False Which of the following is not a characteristic of a K-selected population? extensive parental care produce many offspring long-lived produce few offspring

Answer 1

1. 90% . 90% of energy is lost in metabolic process in each trophic level in the from of heat decrasing the energy from one trophic level to another. In an ecosystem where 10,000kcal of energy is present, only 1000 kcal is transferred to next trophic level.

2. Carrying capacity.

Carrying capacity refers to the number of individuals or maximum population of a species that can survive in an given environment within natural resource limits.

Resource partitioning refer to the division of niche by the species to avoid competition for the resources.

Logistic growth : Logistic gorwth refer to the population size when resource is limited in a habitat. It is also known as Exponential growth.

3. False . Sea stars are keystone species that increase species richness and flow of energy . With its preying activity sea star influence community abundance. It prey on mussels on the rocky intertidal zones of Pacific northwest and generate space for other species to colonise in the community. thereby increasing species richness ( number of species living in a community) in the intertidal zones of the Pacific northwest.

4. Produce many offspring. The life history strategy is classified as r- selection species and k-selection species. k-selection species represent carrying capacity in a habitat . They have large body size, slow growth rate, long life span, low reproductive rate, low reproductive age producing few offspring , good parental care , steady population size near carrying capacity, density independent.

The r-selected species represent population growth rate having characteristics of low body size, early maturity, short life span, produce many offspring while reproducing only once, density dependent unstable population,