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Ecology

Across
a region where fresh water and salt water mix where a river discharges into an ocean or sea
a set of populations inhabiting a particular area
a growth pattern that levels off due to limiting resources
the variety of a biological system typically conceived as the number of species but also applying to genes biochemistry and ecosystems
an organism that uses resources from another host organism
the disappearance of a species from Earth; local extinction is the disappearance of a species from a region
an organism capable of synthesizing its own food using energy from inorganic molecules
an increasing concentration of persistent toxic substances in organisms at each trophic level from the producers to the apex consumers
a species native to one place
a large-scale community of organisms primarily defined on land by the dominant plant types that exist in geographic regions of the planet with similar climatic conditions
all individuals within a species living within a specific area
a species whose presence is key to maintaining biodiversity in an ecosystem and to upholding an ecological community’s structure
an organism capable of synthesizing its own food molecules from smaller inorganic molecules
Down
the process whereby nutrient runoff causes the excess growth of microorganisms and plants in aquatic systems
all living things in a particular area together with the abiotic nonliving parts of that environment
an accelerating growth pattern seen in populations where resources are not limiting
a perennially frozen portion of the Arctic tundra soil
a symbiotic relationship between two species where both species benefit
an organism that uses sunlight as an energy source to synthesize its own food molecules
an adaptation in which an organism looks like another organism that is dangerous toxic or distasteful to its predators
a collection of all ecosystems on Earth
a forest biome found in temperate and subarctic regions characterized by short growing seasons and dominated structurally by coniferous trees