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The name given to these exogenous (coming from an external source) hormones is endocrine disruptors, due to their tendency to mimic the behaviors of naturally produced bodily hormones. [15] Endocrine disruptors have also been found to affect the levels and behaviors of a number of other bodily hormones.
A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
An agricultural value chain is the integrated range of goods and services (value chain) necessary for an agricultural product to move from the producer to the final consumer. The concept has been used since the beginning of the millennium, primarily by those working in agricultural development in developing countries , although there is no ...
There are two major food chains: The primary food chain is the energy coming from autotrophs and passed on to the consumers; and the second major food chain is when carnivores eat the herbivores or decomposers that consume the autotrophic energy. [16] Consumers are broken down into primary consumers, secondary consumers and tertiary consumers.
An exoelectrogen normally refers to a microorganism that has the ability to transfer electrons extracellularly. While exoelectrogen is the predominant name, other terms have been used: electrochemically active bacteria, anode respiring bacteria, and electricigens. [ 1 ]
Indigenous economics is rooted in the beliefs, norms, and values of individual indigenous communities. Certain concepts often arise: [7] [9] [10] Communal ownership and resource management: Resources such as land and water are often managed communally, with an emphasis on collective responsibility and stewardship.
Policy frameworks in the tool are classified according to the following broad categories: national socio-economic development, food security and nutrition, agriculture and rural development, social protection, natural resources, trade and markets, disaster risk reduction and management, and gender. [4]
Trophic cascades are powerful indirect interactions that can control entire ecosystems, occurring when a trophic level in a food web is suppressed. For example, a top-down cascade will occur if predators are effective enough in predation to reduce the abundance, or alter the behavior of their prey, thereby releasing the next lower trophic level from predation (or herbivory if the intermediate ...