Ecology and Biodiversity

The functioning of an ecosystem mainly depends on the pattern of energy flow.

These are the species that make a small proportion of total biomass of community, yet have an impact on community organization and survival.

r-selected species are adapted for rapid reproduction in unstable or disturbed environments like small parks. They produce many offspring, have short lifespans, and are good colonizers. Small, fragmented parks are ideal habitats for such species due to frequent disturbance and edge effects.

1. The area of two overlapping ecosystems is called ecotone. An ecotone is a transition area between two biomes. It is where two communities meet and integrate. It may be narrow or wide, and it may be local or regional. An ecotype, sometimes called ecospecies, describes a genetically distinct geographic variety, population or race within species (or among closely related), which is adapted to specific environmental conditions.

1. The final stable community in ecological succession is called climax. Ecological succession is defined as an orderly process of changes in the community structure and function with time, mediated through modifications in the physical environment, and ultimately culminating in a stabilised ecosystem known as climax. The complete sequence of communities which are transitory is known as seral stages or seres.

All are essential functions of the ecosystem.

Conservation of living resources requires a holistic ecosystem approach. It involves protecting not just individual species but also their interactions with each other and with abiotic elements like soil, water, and air. Effective conservation must address the entire ecosystem to maintain ecological balance.

Resource ecology studies how organisms utilize environmental resources and is synonymous with conservation ecology, which focuses on resource management and protection. Ecosystem ecology studies energy flow and nutrient cycling, while applied ecology is broader.

The maximum number of individuals that can be sustained in a given environment without adversely affecting the existence of others is called the carrying capacity of the environment.

This is the correct option.

The diversity-stability hypothesis proposes that ecosystems with higher species diversity are more stable and better able to resist disturbances. This is because diverse ecosystems have more functional redundancy and complex food webs that can buffer against the loss of any single species. The other hypotheses listed relate to plant physiology (Raunkiaer's) or unrelated ecological concepts.

An ecotone is a transition zone between two different ecosystems or vegetational types, such as the edge between a forest and grassland. These areas often have higher species diversity than either adjacent ecosystem because they contain species from both communities plus edge specialists. Ecotones are not specific forest, terrestrial, or xeric-hydrological zones themselves - they are the boundaries between distinct zones.

Biotic resources are resources obtained from the biosphere and have life, such as plants, animals, and microorganisms. They are derived from living things (flora and fauna) and are renewable resources. Options A, B, and D are incorrect because biotic resources are not man-made, derived from non-living things, or from dead matter.

Respiration (consuming O2, releasing CO2) and photosynthesis (consuming CO2, releasing O2) are complementary processes maintaining atmospheric balance. Both oxygen and carbon dioxide cycles depend on this reciprocity. Other pairings (respiration-reproduction, respiration-transpiration, transpiration-photosynthesis) lack this fundamental complementary relationship.