Calculating the Efficiency of Biomass & Energy Transfers Transfer of energy through a food chain During photosynthesis organisms such as plants convert light energy into chemical energy stored ...
Net Primary Productivity During photosynthesis organisms such as plants convert light energy into chemical energy stored in biological molecules Organisms that do this are known as producers The ra...
Stages of Succession Ecosystems are dynamic, meaning that they are constantly changing The process of ecosystem change over time is known as succession During succession, the biotic and abiotic con...
Practical: Determining Distribution & Abundance Finding out about the abundance and distribution of species can be achieved by counting all of the organisms present in a habitat This is possibl...
Niches: Distribution & Abundance The place where a species lives is known as its habitat Species will occupy a specific niche within a habitat The term niche can be defined as the role of a spe...
Biotic Factors The abundance and distribution of a species within a habitat are determined by a combination of biotic and abiotic factors Biotic factors are living factors that influence population...
Ecosystems: Key Terms Habitat Species are adapted, or well-suited, to life in a particular habitat A habitat can be defined as the place where an organism lives A habitat can be large, e.g. a deser...
Sustainability & Plant Materials Sustainability refers to the using resources in such a way that the requirements of the current generation are met without depleting these resources for future ...
Conditions Required for Bacterial Growth Bacteria are microscopic prokaryotes (meaning their cells do not contain a nucleus or membrane-bound organelles) They are often used in studies to test anti...
