Answer:
reduction in biodiversity by eliminating spawning and nursery grounds of aquatic life
Explanation:
Estuaries are transition zones localized between rivers and marine ecotones. These regions are influenced by marine factors such as waves, tides, and saline water, while rivers provide freshwater and sedimentary material. The mixture between seawater and freshwater is generally highly nutritive, thereby estuaries often represent high-production systems where fishes and shellfishes spawn and grow. However, many estuaries have suffered the negative effects of human activities, including deforestation, drainage, overfishing, nutrient pollution, etc.
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All of Darwin’s observations would prove this theory true.
The basic structure of bones is bone matrix, which makes up the underlying rigid framework of bones, composed of both compact bone and spongy bone. The bone matrix consists of tough protein fibers, mainly collagen, that become hard and rigid due to mineralization with calcium crystals.
