What is an important limit of the terrestrial biosphere for taking up the excess carbon released to the atmosphere by humans? [PICK TWO ANSWERS]     The ocean circulation system is changing in reponse to climate     Plant growth is limited by available nutrients     Warmer temperatures and more biomass may result in more fire     Sea level rise is destroying wetland ecosystems     Trees fall down if they get too big

Forest fires are key to shaping the ecosystem of Yellowstone National Park. Fires add more nutrients to the soils and can aid in seed germination. After a fire burns down many of the trees in an area, new vegetation takes over. This new vegetation is mostly various grass species that did not grow in the area before the fire. Which of the following is a biotic explanations for why the grasses did not grow in the area before the fire? select the best answer O The grass seeds were not able to get blown into the forest before the fire. O The shrubs and trees were better competitors for sunlight that is needed for grasses to grow The fire helped to add nutrients into the soil that is required for the grasses to grow O Hot temperatures from the fire is needed for grass seeds to germinate

Variety of Plant Life in Texas Ecoregions Ecoregion Trees Shrubs Conifers Succulents Vines Grasses Wildflowers Q 15 2 7 11 18 4 1 6 6 9 14 3 2 5 5 9 13 9 4 4 4 12 15 The table describes the number of the most common plants for ecoregions in Texas. Which statement can best be supported by the information? 16 F Ecoregion Q has a lot of animals that eat the plants. G Ecoregion R has a variety of biotic factors that support the abiotic factors. H Ecoregion S has poor soil quality and extremely high precipitation. J Ecoregion T has the abiotic factors to support the greatest variety of plant life.

An effective way to reduce future atmospheric warming would be to reduce international trade protect tropical rainforests and help them to regrow document all of the biodiversity in areas prior to development tightly regulate economic growth reduce infectious diseases spread by animals

plant in ________are adapted to grazing and periodic fires 1- desert 2- tropical rainforest 3- grassland 4- boreal forest

How does matter move through an ecosystem?     flows     cycles

The benthic zone is home to organisms which are     photosynthetic.     intertidal.     heterotrophic.     adapted to high light.   Some ecosystems develop a vertical structure (such as seen in a tropical forest). The cause of this is due to competition for which resource?      nitrogen     minerals     moisture     carbon dioxide     light   The biome that is characteristic of Bronx County is a     taiga.     temperate deciduous forest.     temperate rain forest.     desert.     coniferous forest.

13. Nutrient pollution leads to __________ in many coastal waters and can cause dead zones.   excess carbon accelerated tertiary productivity oxygen depletion lowered primary productivity in the short term

The mountain pine beetle inhabits western North America, where it feeds on the inner bark of pine trees. In recent years, the beetles expanded hundreds of km north, because winters are warmer. Their eggs are kill ed by extreme cold events, which no longer occur Rising temperatures have also stressed the trees, making them more vulnerable to mountain pine beetle mortality. The mortality trees is now so extensive that the forests are projected to become a net carbon source instead of a carbon sink, releasing 200 megatons of carbon per year by the year 2020. The response of mountain pine beetles to warmer temperatures can be described as: () acclimation adaptation O radiative forcing range shift phenological shift

Which ecosystem is not considered a major biome?         temperate forests         grasslands         mountains         taigas