spatial and temporal variation Flashcards
How is coral reef health measured using Z-scores?
The Z-score formula is:
Z= (mean−grandmean)/ standarddeviation
A positive Z-score indicates coral cover above average, while a negative Z-score indicates below-average coral cover.
What is a limitation of using Z-scores to measure coral reef health?
Z-scores do not account for temporal variability in coral cover. For example, if coral cover was high for a long period but then crashed, the Z-score would not reflect this change.
Why is stability important when measuring coral reef health?
Stability is important because it complements Z-scores by accounting for changes in coral cover over time, offering a better understanding of the reef’s overall health and resilience.
What is the oasis concept in coral reefs?
Oases in coral reefs are areas with unique environmental conditions that provide crucial habitats for marine species, supporting high biodiversity and ecosystem resilience.
What are the key characteristics of coral reef oases?
- Unique conditions: Specific environmental factors like light, nutrients, and water movement support diverse life.
- Critical resources: They offer food and shelter, especially in surrounding less hospitable areas.
- Biodiversity support: Serve as breeding and nursery grounds for fish and invertebrates.
Why are coral reef oases ecologically and economically important?
Oases contribute to ecological balance by supporting biodiversity and providing essential resources. They also offer economic benefits through fisheries and tourism, making their protection vital.
What is the significance of the oasis concept for reef management?
The oasis concept helps managers and conservationists identify promising sites for protection, focusing efforts on areas that may be more resilient or critical to ecosystem health.
What conclusions can be drawn about reef responses to disturbances?
Not all reefs respond equally to disturbances; some reefs are more resilient. The oasis concept helps identify areas with the potential to maintain ecosystem health even after degradation.
