地理漫步·世界地理英语30篇（4）
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The Great Barrier Reef: Coral Architecture and Oceanic Current Boundaries
大堡礁：珊瑚构筑与海洋流界的空间格局
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This vast reef system stretches over two thousand kilometers along Australia’s northeast coast.
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Its complex coral structures form habitats shaped by warm, shallow waters and strong tidal currents.
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Oceanic boundaries like the East Australian Current steer nutrient flow and larval dispersal across reefs.
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Sea surface temperature gradients influence coral bleaching events in spatially uneven patterns.
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Geographic isolation of reef sections creates distinct genetic populations among staghorn corals.
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Shallow lagoons between reefs and mainland reflect sediment transport controlled by wind and wave direction.
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Tectonic stability allows slow reef accretion, yet sea-level rise now threatens vertical growth capacity.
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Island platforms within the reef emerge from volcanic foundations overlain by carbonate sediments.
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Local bathymetry determines where internal waves break, enhancing nutrient upwelling for plankton blooms.
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Coral health maps reveal sharp ecological transitions aligned with cross-shelf current shear zones.