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31 Cards in this Set
- Front
- Back
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Stratification |
The process by which different layers of water are created in a pond or lake due to density differences driven by temperature |
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Epilimnion |
Uppermost layer of water when a lake or pond is stratified this layer extends from the surface to the thermocline during summer stratification and is usually mixed well due to interactions with the atmosphere |
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Thermocline |
The point between the epilimnion and hypolimnion where a noticeable change in temperature occurs |
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Hypolimnion |
The bottommost cooler layer of water in a pond or lake (in most situations) that extend from the thermal kind to the bottom. This there will deplete an oxygen concentration since net photosynthesis can become the net respiration, (more breathing than oxygen being made) this trait of hypo Lamium has a lot of management implications. |
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Photosynthesis |
The process by which solar energy is used to synthesize sugars. Oxygen is a byproduct of this. |
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Respiration |
The process by which organic matter is used to create energy, carbon dioxide, and water. Oxygen is consumed in this process (“oxidized”) |
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Anoxic |
A condition of having no oxygen present |
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Hypoxic |
A condition of having very little oxygen present |
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Limnologist |
A person who studies in land, lakes, typically freshwater |
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Ichthyologist |
A person who studies fish |
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Macroalgae |
Algae that can be seen without the use of microscope, (one individual, not a colony of algae) |
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Macrophytes |
Word to describe aquatic plants, and macroalgae as a unit |
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Littoral zone |
Area in a body of water where sunlight can penetrate into the water column to the bottom to allow for macrophyte growth |
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Submersed macrophytes |
Aquatic plants and algae, who spend the majority of their life under the surface of the water. They may poke out the bottom to flower for reproduction, or have small “sun leaves” on occasion. |
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Floating-leaved plants |
Aquatic plants, (no algae) that have a large sun-leaves that float on the surface of the water to maximize solar intake, (water-lilies, for example) |
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Emergent plants |
Aquatic plants, (no algae) that have the majority of their biomass completely outside of the water. They usually are right at the transition zone between water and land, (cattails, and phragmites, for example). |
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Nutrients |
Limiting component to plant growth that are the root cause of all growth in a pond/lake. In limnology a lake/pond management we concentrate on phosphorus, as well as nitrogen. |
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Productivity |
The quantifiable amount of plant and algae growth in a water, body, measured by Secchi transparency, chlorophyll a concentration, and amount of phosphorus in the water. |
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Monoculture |
When one species dominates an area, typically outcompeting the other species that once existed in that area |
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Contact Herbicide |
A type of herbicide that will burn or harm the outside of the target plant |
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Systemic Herbicide |
A type of herbicide that will impact biochemical processes within the target. (“Make the target sick.”) |
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Interspecific Competition |
When two or more different species compete with one another for necessary components to their growth and survival. |
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Intraspecific Competition |
When members of the same species compete with one another for necessary components to their growth and survival. |
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Internal nutrient sources |
Nutrients (usually phosphorus and nitrogen) that come from within the water, body itself such as internal loading from no oxygen at the bottom or decomposition. |
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External nutrient sources |
Nutrients (usually phosphorus and nitrogen) that come from outside the water body (also known as the watershed) |
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Dimictic |
A pond or lake that turns over twice in a given year |
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Polymictic |
A pond or like that turns over multiple times in a given year |
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Bathymetry |
The mapping of the depths, contours of a lake or pond bottom (like an isopleth chart for mountains) |
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Toxicology |
The study of chemical substances which interact with an organism and cause a response |
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OralLD50 |
Amount of a product estimated to kill 50% of a sample population. Used in the field of toxicology. |
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Chemical mode of action |
How a chemical functions/what pathway it takes to produce its desired result (how the chemical works; with regards to algicide and herbicides) |
