Nutrients and Algae. Major Algal Nutrients Phosphorus - taken up by algae as orthophosphate (PO 4 3- ). Nitrogen - taken up by algae as nitrate (NO 3.

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Presentation transcript:

Nutrients and Algae

Major Algal Nutrients Phosphorus - taken up by algae as orthophosphate (PO 4 3- ). Nitrogen - taken up by algae as nitrate (NO 3 - ) or ammonia (NH 4 + ) Silica - used in large amounts by diatoms to make their glass shells

Sources of Nutrients Point Source Pollution – comes out of a pipe

Sewage Treatment Plant

Sources of Nutrients Non-Point Source Pollution - Washes into the water

Agriculture

Fertilized Lawns

Septic Fields

Rain & the Atmosphere

An Example: Crow Hill Pond Topographic Map of the Watershed or Catchment

Aquatic Food Web Nutrients and Light Floating Algae (Phytoplankton) Algae Blobs (Periphyton and Metaphyton) Water Plants (Macrophytes) Zooplankton Bottom Critters (Benthic Invertebrates) Fish

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