Conservation Values
What is one ecological reason to conserve marine species?
Maintaining biodiversity, genetic resources or ecosystem functioning.
What is a marine protected area?
A defined marine area managed to conserve nature, with permitted activities depending on its rules or zone.
What is marine park zoning?
Dividing a park into areas with different rules for activities and protection.
Name two ways the ocean and atmosphere exchange energy or materials.
Heat exchange, evaporation and gas exchange are acceptable examples.
What is a climate scenario?
A possible future based on stated assumptions, such as emissions pathways; it is not a guaranteed outcome.
How can a healthy reef provide economic value?
It supports fisheries, tourism and recreation.
Why is habitat replication useful in marine reserve design?
Protecting multiple examples of a habitat spreads risk if one location is disturbed.
Why are permits used in marine management?
They regulate activities and their impacts, including where, when and how activities occur.
How does warming seawater contribute to sea-level rise?
Thermal expansion increases water volume; melting land ice adds further water.
What makes coral cores useful when examining historical environmental change?
Dated growth bands and chemical proxies preserve evidence of past conditions for comparison with other records.
How do ethical and aesthetic conservation values differ?
Ethical values concern rights and responsibility; aesthetic values concern beauty and spiritual or cultural connection.
Why does connectivity matter when choosing reserve spacing?
Larvae and mobile organisms must be able to move between protected habitats, supporting replenishment.
Why is longitudinal monitoring better than a single survey for detecting recovery?
Repeated measurements reveal trends and variability over time.
How can warming shift the distribution of marine species?
Species may track suitable temperatures towards cooler latitudes or depths, changing communities and fisheries.
In illustrative monitoring, fish biomass rises from 20 to 30 kg per hectare. Calculate the percentage increase.
(30 - 20)/20 x 100 = 50%.
Is shoreline protection by a reef a direct harvest value or an indirect ecosystem service?
An indirect ecosystem service: reef structure reduces wave energy and coastal erosion.
Why can a very small isolated reserve fail to protect a mobile fish species?
Individuals may move outside its boundaries and become exposed to fishing; insufficient habitat and connectivity may also limit protection.
How do government and non-government organisations differ in conservation roles?
Governments can legislate and enforce rules; NGOs can undertake advocacy, research, restoration and community action, often with different flexibility and constraints.
How can acidification indirectly increase coastal erosion risk?
Reduced calcification and reef structure can weaken the reef barrier and allow more wave energy to reach shore.
Two illustrative scenarios predict 60% and 30% reef habitat remaining. What does the difference show?
A 30-percentage-point difference in projected habitat retention under the different assumptions; actual outcomes remain uncertain.
Why should a conservation decision consider several types of value?
Ecological, economic, ethical and aesthetic values reveal different benefits and trade-offs and support a better-justified decision.
Which is usually stronger: protecting one habitat patch or a connected network representing multiple habitats? Explain.
A well-designed network can protect life-cycle habitats, dispersal pathways and replicated habitats, spreading risk. Effectiveness still depends on size, enforcement and threats.
Protected and comparison sites both gain similar fish biomass after protection. Does this prove the reserve caused recovery?
No. A shared environmental driver may explain both gains. Before-after data, suitable comparison sites and replication improve causal inference.
Why could disrupted upwelling reduce ocean productivity?
Reduced delivery of deep nutrients to the sunlit surface limits phytoplankton growth and energy available to food webs.
Why should future reef predictions include uncertainty and local conditions?
Models simplify systems and rely on assumptions. Local water quality, exposure, connectivity and resilience can alter regional responses.