Question

based on the data provided, select the words to describe how a decrease in the total area of a salt marsh would affect the flow of energy and matter into and out of the salt marsh.
photosynthesis in the salt marsh would -select an answer-. this would cause the flow of energy and matter into and out of the ecosystem to -select an answer-. as a result, the productivity of the salt marsh would -select an answer-, and there is -select an answer- plant biomass.

Explanation:

1. For the first dropdown (Photosynthesis in the salt marsh would...): A decrease in salt marsh area means fewer plants (producers) doing photosynthesis. So photosynthesis would decrease (since less area → less photosynthetic activity).
2. Second dropdown (flow of energy and matter...): Photosynthesis is how energy (from sun) and matter (CO₂, H₂O) enter the ecosystem as organic matter. If photosynthesis decreases, the flow of energy and matter into (and thus through) the ecosystem would decrease (because less input from photosynthesis reduces the overall energy/matter flow).
3. Third dropdown (productivity of the salt marsh...): Productivity is the rate of biomass production (via photosynthesis). With less photosynthesis, productivity would decrease.
4. Fourth dropdown (plant biomass...): Since productivity (biomass production) decreases, the amount of plant biomass (the result of productivity over time) would be less (or "decreased").

Answer:

1. -Select an Answer-: decrease
2. -Select an Answer-: decrease
3. -Select an Answer-: decrease
4. -Select an Answer-: less (or "decreased" depending on options; assuming options like increase/decrease/less/more, "less" fits for biomass amount)

(Note: If the dropdown options for each are, e.g., "increase", "decrease", "stay the same", the correct selections are "decrease" for the first three, and "less" (or "decrease" if phrased as "there is decreased plant biomass") for the last. The exact wording depends on the provided options, but the logic is based on ecological principles: less area → less photosynthesis → less energy/matter flow → less productivity → less biomass.)