You're kayaking and you notice that you can see pretty deep down to the bottom of the lake. You would most likely decribe this water body as...   Selected Answer:  Answers:  eutrophic   platytrophic   dystrophic   oligotrophic

One approach to conservation of fish populations is to releaseunwanted fish accidentally caught in trawling nets. Such fishoften have very high concentrations of lactic acid in their bodies.Why do you think they have these high concentrations of lacticacid, and how might their survival after release be affected bytheir condition?

It is common for bogs to have a pH of 3, why does this make them nutrient poor? 1. Low pH reduces the solubility of many nutrients. 2. Low pH increases nutrient binding to organic matter. 3. Low pH prevents the growth of the microorganisms responsible for the breakdown of organic matter. 4. Low pH reduces cation exchange.

What natural and human-influenced factors may affect the following water chemistry parameters, and why, specifically, do the perturbations influence the integrity/health of the marsh ecosystem? pH: DO2 concentrations% saturation: Temperature:

Deep Biosphere Microbes Complete each sentence about the benthic microorganisms. 1. Sediment samples from water depths up to 8,200 m reveal the presence of a vast (Click to select) ✓ 2. The piezosphere describes the (Click to select) ✓ at depths with pressures exceeding 100 atm. 3. Here microbes are 10 to 10,000 greater per unit volume than in productive surface waters. Reasons for this difference are complicated but include high energy availability and limited (Click to select) Estimates indicate that the benthic microorganisms comprise up to one-third of Earth's total living (Click to select) ✓