Biotic factors include plants, animals, and microbes; important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients dissolved in the water, proximity to land, depth, and temperature. Sunlight is one the most important abiotic factors for marine ecosystems.
What affects marine biodiversity?
The pressure on marine ecosystems and the resources they provide is increasing as threats introduced by land-use change, overfishing, climate change, the invasion of non-native species and other impacts of anthropogenic activities affect biodiversity.
Which factors are affecting the marine life?
In our oceans, there are a number of environmental conditions that affect the growth, survival and productivity of marine organisms. These include light availability, oxygen levels, water movement, salinity, density and pH.
What are three factors that affect marine life?
Three factors that determine the kinds of marine life and where they can live in the oceans is water depth, light, how fast environmental conditions change.
What are the major threats to marine biodiversity?
Some threats are: Pollution, Habitat Destruction (loss), Introduction of alien species, Overexploitation, Climate change and Declining marine biodiversity worldwide is a major and on going environmental dilemma.
What causes marine biodiversity loss?
Causes of Ocean Habitat Loss
Wetlands are dredged and filled in to accommodate urban, industrial, and agricultural development. Cities, factories, and farms create waste, pollution, and chemical effluent and runoff that can wreak havoc on reefs, sea grasses, birds, and fish.
What is marine biodiversity?
Marine biodiversity is an aggregation of highly inter-connected ecosystem components or features, encompassing all levels of biological organization from genes, species, populations to ecosystems, with the diversity of each level having structural and functional attributes (Table 1).
What are the factors that affect the distribution and diversity of marine plankton?
The influence of various factors on the seasonal appearance of phytoplankton differs significantly, with physical factors (such as temperature and light intensity) being the most important and chemical (DO, pH, salinity, total hardness, EC and nutrient level) being of lesser importance (Reynolds, 1984).
What are threats to oceans?
5 of the biggest threats to life in our oceans
- Ocean noise. …
- Ship strikes. …
- Climate change. …
- Entanglement in fishing gear. …
- Plastics and ocean debris.
What problems are marine animals facing today?
But, before we get too ahead of ourselves, it is important to address the issues that are facing marine mammals.
- Ship Strikes. …
- Acoustic Pollution. …
- Open Net Fishing. …
- Oil Spills. …
- Agricultural Runoff. …
- Commercial Hunting. …
- Climate Change. …
- 8. Entertainment and Captivity.
Which is a biotic factor in a marine ecosystem?
In a marine ecosystem, some of the biotic factor are algae, fungi, microorganisms (such as bacteria), plants, animals and corals. These living beings compete against each other for food and resources, are part of the predator-prey relation, and also include the decomposers.
How does light affect marine life?
Because of evolutionary processes, marine organisms are adapted to detect low intensity, regular cycles, and distinct spectra of natural light. The survival, reproduction, physiology, and movement of marine fishes, corals, birds, turtles, and other invertebrates are affected by artificial light at night (ALAN).
How does ocean pollution affect marine life?
Fish, seabirds, sea turtles, and marine mammals can become entangled in or ingest plastic debris, causing suffocation, starvation, and drowning. … On many beaches, plastic pollution is so pervasive that it’s affecting turtles’ reproduction rates by altering the temperatures of the sand where incubation occurs.