Environmental Science and Anthropocene Studies Flashcards

Vocabulary flashcards covering topics in human environmental impact, geology, palynology, demography, conservation biology, urban ecology, and biogeochemical cycles.

Palynology

The study of pollen grains and spores, which serve as durable indicators of past environmental conditions and plant agriculture due to their chemically resistant outer layer.

Exine

The chemically resistant outer coating of pollen grains that prevents degradation within anoxic environments.

Anthropocene Event Timelines

Key anthropogenic milestones and their time ranges: Pleistocene megafaunal extinctions ($50,000 - 10,000$ years before present), Dawn of agriculture ($11,000 - 8,000$ years before present), Globalization and Columbian interchange ($1492 - 1620$), Industrial revolution ($1760 - 1880$), and The Great Acceleration ($1950 - 1965$).

Age Structure Pyramids

Demographic diagrams depicting population distribution across age and sex categories, classified into four stages: Rapidly Expanding (Mainly Rural), Expanding, Stationary, and Contracting (Mainly Rural).

Per-Capita $CO_2$ Emissions

Metrics tracking annual per-capita emissions (led by Qatar at $37.0$  tons) and cumulative per-capita emissions from 1850-2021 (led by Canada at $1,751$$tCO_2$).

Haber-Bosch Process

An industrial nitrogen fixation process that converts atmospheric nitrogen into reactive forms, doubling the global natural rate of nitrogen fixation.

Eutrophication

An ecological response to excessive nutrient inputs (like nitrogen and phosphorus) into water bodies, causing algal blooms, hypoxic dead zones, community shifts, and production of $N_2O$.

Biotic Homogenization

The widespread mixing of biota across geographical boundaries, resulting in exotic species comprising up to $20\%$ of plant species in many Northern Hemisphere continental regions.

Planetary Boundaries

Critical threshold limits within key Earth systems (e.g., ocean acidification, biogeochemical cycles, carbon cycle) that, if crossed, risk driving rapid and severe environmental changes.

Primary Research Article

A scientific publication presenting results of original research, such as experiments, data analyses, mathematical models, and simulations.

Review Paper

A scientific paper that synthesizes and evaluates findings from multiple previously published primary studies.

White Paper

An authoritative report issued by a government or organization that presents information, policy proposals, or advocated solutions for a specific problem.

Seventh Generation Principle

An Iroquois concept of intergenerational responsibility dictating that current decisions must consider impacts on humans seven generations into the future.

Columbian Exchange

The cross-Atlantic transfer of crops, animals, human populations, and diseases between $1492$ and $1620$ following global exploration.

The Great Acceleration

The period beginning around $1950$ marked by rapid exponential growth in human population, industrialization, resource consumption, and environmental alteration, widely recognized as the start of the Anthropocene.

Afforestation

The practice of establishing trees on land that historically did not contain tree cover, distinct from ecological forest restoration.

Total Fertility Rate (TFR)

The average number of children born to a woman over her lifetime within a given population.

Demographic Transition

A multi-stage model describing how human populations transition from high birth and death rates to low birth and death rates during economic and social development.

PAT Formula

An equation expressing total human environmental impact as $Impact = Population \times Affluence \times Technology$.

Habitat Loss

The complete conversion of a natural ecosystem into a non-habitat environment unsuitable for native species.

Habitat Degradation

A reduction in the environmental quality or suitability of a habitat for wildlife without complete conversion.

Matrix

The modified or inhospitable surrounding land area that lies between and isolates remaining natural habitat patches.

Edge Effects

Distinct physical and biological alterations occurring at boundary zones of fragmented habitats, including drier conditions, elevated fire risk, higher nest predation, and alien species invasions.

Metapopulation

A group of spatially separated subpopulations of the same species that interact through migration, colonization, and local extinction processes.

Land Sparing

A conservation strategy that prioritizes setting aside large, intact natural reserves while practicing high-yield intensive agriculture on separate designated lands.

Land Sharing

A conservation strategy that combines wildlife protection and human activities like low-intensity agriculture on the same multi-use land.

SLOSS Debate

A debate in conservation biology concerning whether biodiversity is more effectively protected by a Single Large Or Several Small nature reserves.

Neonicotinoids

Systemic agricultural insecticides applied to crops or seeds that permeate plant tissues, making nectar, pollen, and honeydew toxic to non-target insects.

Urban Ecology

The scientific study of the interactions of living organisms with each other and their environment within urbanized human landscapes.

Luxury Effect

The pattern in urban ecology where urban biodiversity and green space density increase in proportion to higher neighborhood socioeconomic wealth.

Urban Sprawl

The outward growth of low-density, single-family residential communities around cities, leading to land conversion and auto dependency.

Exurban Development

Low-density residential land use on large lots located beyond suburban borders but within commuting distance of urban centers.

Nitrification

The biological oxidation of ammonium ($NH_4^+$) into nitrite and nitrate ($NO_x$) by specialized soil bacteria.

Denitrification

The microbial reduction of soil nitrates ($NO_x$) into nitrous oxide ($N_2O$) or inert dinitrogen gas ($N_2$).