Nutrient availability refers to the accessibility of essential nutrients in the environment for organisms, particularly plants and animals. These nutrients, such as nitrogen, phosphorus, and potassium, are crucial for growth and development. Factors like soil composition, moisture, and pH levels can influence how readily these nutrients can be absorbed by plants. In ecosystems, nutrient availability affects food chains and biodiversity. For instance, when nutrients are abundant, plants can thrive, supporting herbivores and, in turn, carnivores. Conversely, limited nutrient availability can lead to poor plant growth, impacting the entire ecosystem, including species like deer and eagles.