Ecology And Ecosystems
What characterizes the taiga (boreal forest) biome?
The taiga features long, cold winters, short summers, coniferous trees (spruce, pine, fir), acidic soils, and relatively low biodiversity.
An endangered species is one that faces a very high risk of extinction in the wild in the near future, as classified by organizations like the IUCN.
Ecological overshoot occurs when humanity's demand on nature exceeds the biosphere's regenerative capacity, meaning we consume resources faster than they can be renewed.
A decomposer is an organism, such as bacteria or fungi, that breaks down dead organic matter and recycles nutrients back into the ecosystem.
Ecology And Ecosystems
What is agroforestry?
Sustainability is meeting present needs without compromising the ability of future generations to meet their own needs, balancing environmental, social, and economic factors.
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another, from producers to top consumers.
Agroforestry is a sustainable land-use system that integrates trees and shrubs with crops and/or livestock to enhance biodiversity, improve soil health, and increase carbon sequestration.
The taiga features long, cold winters, short summers, coniferous trees (spruce, pine, fir), acidic soils, and relatively low biodiversity.
Ecology And Ecosystems
What is the ecological footprint?
An ecological footprint measures the amount of biologically productive land and water area required to produce the resources a population consumes and absorb its waste.
Habitat fragmentation is the process by which large, continuous habitats are divided into smaller, isolated patches, reducing biodiversity and disrupting wildlife movement.
Density-dependent factors are influences such as competition, predation, disease, and parasitism whose effects intensify as population density increases.
The water cycle (hydrological cycle) is the continuous movement of water through evaporation, condensation, precipitation, runoff, and infiltration between Earth's surface and atmosphere.
Ecology And Ecosystems
What is the carbon cycle?
The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, atmosphere, oceans, and geosphere through processes like photosynthesis, respiration, and combustion.
Ocean acidification reduces the availability of carbonate ions , making it harder for organisms like corals, mollusks, and plankton to build calcium carbonate shells and skeletons.
A tertiary consumer is a predator that feeds on secondary consumers, occupying the fourth trophic level in a food chain.
Conservation biology is the scientific study of the nature and status of Earth's biodiversity with the aim of protecting species, habitats, and ecosystems from excessive extinction.
Ecology And Ecosystems
What is the IUCN Red List?
An r-selected species is characterized by high reproductive rates, small body size, short lifespan, and little parental care, thriving in unstable environments.
Mutualism is a symbiotic relationship in which both species benefit, such as bees pollinating flowers while obtaining nectar.
The IUCN Red List is the world's most comprehensive inventory of the global conservation status of biological species, using categories from Least Concern to Extinct.
An ecological niche is the role and position a species occupies in its environment, including its habitat, diet, activity patterns, and interactions with other species.
Ecology And Ecosystems
What is an indicator species?
Logistic growth is population growth that slows as the population approaches carrying capacity, producing an S-shaped (sigmoid) curve.
Abiotic factors are nonliving components such as temperature, sunlight, water, soil, wind, and minerals that influence living organisms in an ecosystem.
Deforestation leads to loss of biodiversity , increased carbon emissions, soil erosion, disrupted water cycles, and loss of habitat for countless species.
An indicator species is an organism whose presence, absence, or abundance reflects the health or specific environmental conditions of an ecosystem, such as lichens indicating air quality.
Ecology And Ecosystems
What are abiotic factors in an ecosystem?
Biotic factors are the living components of an ecosystem, including producers, consumers, decomposers, and their interactions.
Sustainable development is development that meets the needs of the present without compromising the ability of future generations, integrating economic growth with environmental protection.
The CBD is an international treaty adopted in 1992 aimed at conserving biological diversity, promoting sustainable use of its components, and ensuring fair sharing of genetic resource benefits.
Abiotic factors are nonliving components such as temperature, sunlight, water, soil, wind, and minerals that influence living organisms in an ecosystem.
Ecology And Ecosystems
What is the main cause of current biodiversity loss?
The nitrogen cycle is the biogeochemical process by which nitrogen is converted between its various chemical forms as it circulates through the atmosphere, soil, and organisms.
The main cause of current biodiversity loss is habitat destruction driven by human activities such as deforestation, urbanization, and agricultural expansion.
The tundra is characterized by extremely cold temperatures, a short growing season, permafrost, low precipitation, and vegetation limited to mosses, lichens, and low shrubs.
A decomposer is an organism, such as bacteria or fungi, that breaks down dead organic matter and recycles nutrients back into the ecosystem.
Ecology And Ecosystems
What is a decomposer?
The greenhouse effect is the process by which greenhouse gases (CO₂, CH₄, N₂O) in the atmosphere trap heat radiated from Earth's surface, warming the planet.
A decomposer is an organism, such as bacteria or fungi, that breaks down dead organic matter and recycles nutrients back into the ecosystem.
A desert biome receives less than 25 cm of annual precipitation, experiences extreme temperature fluctuations, and supports organisms with specialized water-conservation adaptations.
A temperate deciduous forest is a biome with moderate rainfall, distinct seasons, and trees that shed their leaves in autumn, such as oaks and maples.
Ecology And Ecosystems
What defines the tundra biome?
A threatened species is likely to become endangered in the foreseeable future, while an endangered species already faces imminent risk of extinction.
Approximately 10 million hectares of forest are lost each year, primarily in tropical regions of South America, Africa, and Southeast Asia.
high evenness means species have similar population sizes.
The tundra is characterized by extremely cold temperatures, a short growing season, permafrost, low precipitation, and vegetation limited to mosses, lichens, and low shrubs.
Ecology And Ecosystems
What is an example of mutualism involving mycorrhizae?
A terrestrial ecosystem is a land-based community of organisms and their environment, including forests, deserts, grasslands, and tundra.
Eutrophication is the excessive enrichment of a water body with nutrients (especially nitrogen and phosphorus), leading to algal blooms, oxygen depletion, and aquatic dead zones.
Mycorrhizal fungi colonize plant roots, enhancing water and mineral absorption for the plant while receiving carbohydrates produced by photosynthesis.
Deforestation leads to loss of biodiversity , increased carbon emissions, soil erosion, disrupted water cycles, and loss of habitat for countless species.