Why do slow biological processes contribute to environmental fragility in cold environments?

Slow biological processes mean vegetation and ecosystems recover extremely slowly after disturbance, as growth rates, reproduction, and succession are limited by low temperatures.

How do thin soils make cold environments environmentally fragile?

Thin soils provide limited nutrient reserves and root anchorage, so once disturbed or eroded they take centuries to reform, leaving ecosystems vulnerable to long-term degradation.

Why do short growing seasons increase the fragility of cold environment ecosystems?

Short growing seasons restrict the time available for plant growth and reproduction, limiting the ability of vegetation to recover from damage within a single year.

How does low species diversity contribute to environmental fragility in cold regions?

Low species diversity means fewer species can fill ecological niches if one is lost, reducing ecosystem redundancy and making the system less able to absorb disturbance.

What is thermokarst, and why does vegetation removal in permafrost areas risk triggering it?

Thermokarst is irregular, hummocky terrain formed by ground subsidence when ice-rich permafrost thaws. Removing vegetation exposes dark soil that absorbs more heat, accelerating thaw and causing irreversible collapse.

Explain why pollutants and waste persist for extended periods in cold environments.

Low temperatures slow microbial activity and chemical reactions, greatly reducing decomposition rates so that organic waste and pollutants remain in the environment much longer than in warmer climates.

AQA A-Level Geography 7037

Water and Carbon Cycles

Topic overview Systems, Stores and Flows Mass Balance in Water and Carbon Stores Fieldwork and the Rainforest Case Study Measures of Central Tendency and Dispersion Spearman's Rank, Chi-Square and Data Analysis Scatter Graphs, Triangular Graphs and Logarithmic Scales Atlas, Thematic and Flow-Line Maps OS Maps, Sketch Maps and Field Sketches Remote Sensing, GIS and Big Data Qualitative Data, Questionnaires and Interviews Sampling, Accuracy and Measurement Error Data Misuse and Research Ethics The Global Water Stores Evaporation, Condensation and Cloud Formation Precipitation and Cryospheric Processes The Drainage Basin as an Open System Infiltration and Overland Flow The Water Balance Equation Flood Hydrographs Human Impacts on the Water Cycle The Global Carbon Stores Photosynthesis, Respiration and Carbon Transfer Farming, Land Use and Carbon Sinks Greenhouse Gases and Links between the Cycles Feedback Loops and Climate Change Carbon Sequestration and Mitigation Mass Balance in a Drainage Basin Unit Conversion and Flux Calculations Line Graphs, Bar Graphs and Pie Charts Water and Carbon Cycles in the Tropical Rainforest The Amazon rainforest case study Stores within a River Catchment Transfers and the Controls on Catchment Hydrology The River Eden catchment case study

Hot Desert Systems and LandscapesLandscape

Topic overview Deserts as Systems: Inputs, Stores, Flows and Feedback Desert Climate, Soils and Vegetation The Aridity Index Energy, Sediment and Geomorphic Processes in Deserts Thermal Fracture and Rock Breakdown Deflation, Abrasion and Aeolian Transport Desert Water Sources and Ephemeral Streams Deflation Hollows, Yardangs and Zeugen Barchan and Seif Dunes Wadis, Bahadas and Pediments Playas, Inselbergs and Landscape Development Observation, Measurement and Mapping in Deserts Death Valley hot desert case study The Causes and Definition of Desertification Environmental Impacts of Desertification Human Impacts and Responses to Desertification Desertification on the Yatenga plateau, Burkina Faso

Coastal Systems and LandscapesLandscape

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Glacial Systems and LandscapesLandscape

Topic overview Glaciers as Systems: Inputs, Stores and Flows Ice-Albedo and Negative Feedback Dynamic Equilibrium, Landforms and Landscapes The Glacial Mass Budget and Ice Movement The Distribution of Cold Environments Climate, Soils and Vegetation in Cold Environments Corrie Formation Glacial Troughs and Hanging Valleys Roches Moutonnées, Drumlins and Erratics Moraines, Till and Fluvioglacial Landforms Periglacial Landforms and Processes Thermokarst and Landform Distribution The Fragility of Cold Environments Impacts and Management of Cold Environments Fieldwork Skills in Glaciated Environments Glacial Case Study Requirements Cwm Idwal and the Ogwen valley case study Alaska as a contrasting glaciated landscape

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Ecosystems Under StressHazards or ecosystems

Topic overview Biodiversity Levels and Causes of Decline Biodiversity Loss and Ecosystem Services Ecosystem Structure, Trophic Levels and Food Webs Ecosystem Inputs, Outputs, Stores and Transfers Biomass, Net Primary Production and Succession Nutrient Cycling, Climate and Soil Environmental Controls and Ecosystem Feedback Biomes and the Tropical Rainforest Environment Rainforest Stratification and Adaptations Savanna Climate, Soils and Adaptations Human Impacts on the Tropical Rainforest Human Impacts on the Savanna Succession and Climatic Climax Temperate Deciduous Woodland Plagioclimax and Heather Moorland Coral Reef Conditions, Services and Stresses Human Pressures and Coral Reef Management The Great Barrier Reef: Extent and Bleaching Crown-of-Thorns Starfish and Reef Tourism Local Ecosystems: Heathland, Parkland, Ponds and Dunes Adaptations to Dry Environments Agriculture, Urbanisation and Invasive Species Ecological Change and Conservation Strategies Sustainability and Stakeholder Conflict Studying Local Ecosystems and Ecological Change The Sefton Coast sand dunes case study Ecological change in Borneo

Global Systems and Global Governance

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Glacial Systems and Landscapes

The Fragility of Cold Environments

3 things to know
Component 1

Overview

Recall questions on slow biological processes, thin soils, short growing seasons and low species diversity as sources of fragility.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

Why were historical indigenous hunting and fishing practices in cold environments generally sustainable?

Key term

What role did mining play in twentieth-century impacts on cold environments?

Key term

In what forms did pollution occur as a result of twentieth-century resource extraction in cold environments?

Questions from this subtopic

Each one with the model answer underneath.

1
Why do slow biological processes contribute to environmental fragility in cold environments?
Model answer
Slow biological processes mean vegetation and ecosystems recover extremely slowly after disturbance, as growth rates, reproduction, and succession are limited by low temperatures.
2
How do thin soils make cold environments environmentally fragile?
Model answer
Thin soils provide limited nutrient reserves and root anchorage, so once disturbed or eroded they take centuries to reform, leaving ecosystems vulnerable to long-term degradation.
3
Why do short growing seasons increase the fragility of cold environment ecosystems?
Model answer
Short growing seasons restrict the time available for plant growth and reproduction, limiting the ability of vegetation to recover from damage within a single year.
4
How does low species diversity contribute to environmental fragility in cold regions?
Model answer
Low species diversity means fewer species can fill ecological niches if one is lost, reducing ecosystem redundancy and making the system less able to absorb disturbance.
5
What is thermokarst, and why does vegetation removal in permafrost areas risk triggering it?
Model answer
Thermokarst is irregular, hummocky terrain formed by ground subsidence when ice-rich permafrost thaws. Removing vegetation exposes dark soil that absorbs more heat, accelerating thaw and causing irreversible collapse.
6
Explain why pollutants and waste persist for extended periods in cold environments.
Model answer
Low temperatures slow microbial activity and chemical reactions, greatly reducing decomposition rates so that organic waste and pollutants remain in the environment much longer than in warmer climates.

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