They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.
Answer:
Photosynthesis takes in energy from the sun, CO2 and H2O and produces Glucose(don't know formula), O2 and H2O. This means the water is needed for the reaction but isn't transformed. This means that in areas with greater average rainfall, plants generally grow faster.
Please help with my recent questions if this helped. :)
An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system.
Answer:
Continental drift theory is the correct answer
Explanation:
Each step in a food chain or web is called a trophic level
