Answer:
Excessive nutrients from fertilizer run off.
Explanation:
Scientists have suspected that phytoplankton blooms might be connected to agricultural run-off. They got some evidence from a recent study by comparing the timing of irrigation along the west coast of Mexico and phytoplankton blooms in Mexico’s Sea of Cortez. During the comparison, they had found a close correlation. Phytoplankton blooms occurred in the Sea of Cortez shortly after the irrigation. This happened because of carried fertilizers after irrigation and other agricultural run-offs into the sea.
The bloom detected in the Gulf of Mexico on December 13 might be similarly linked to agricultural run-off.
Answer:
(a). soft substrates
Explanation:
Mobile organisms can be measured by both direct and indirect methods. Direct methods may involve observing the actual behavior (e.g., scoring via timing). Moreover, indirect methods are those where the technique used depends on the species being examined, collecting information such as through recording of tracks in the soft substrate (e.g., mud, sand, snow), presence of fur/feathers, droppings (mammals), etc. For example, indirect observation of insects may involve the determination of exoskeletons, sounds, etc.
Answer:
All of the listed responses are correct.
Explanation:
Ecotourism is the approach to allow humans to visit the natural habitats of flora and fauna without harming these natural resources in one or other ways. Some places/countries are specifically rich in natural habitats of species diversity and endemism. These habitats are mostly being destroyed by human activities.
These natural habitats of high endemism and habitat destruction are called biodiversity hotspots. These regions present in various countries should be protected to slow down the current loss of biodiversity. Non-native species mostly harm the native species. In absence of any competitors or natural predators, these non-native species flourish well in new habitats and deprive the native ones of resources.