Envirothon Aquatics #1

What is the name of the device designed for sampling of aquatic macroinvertebrates?

• Whitman's sampler

• Aquatic Macroinvertebrate Sampler

• Hester-Dendy Sampler

• Benthic Drum Sampler

Which of the following nonpoint source pollutants currently are the greatest threat to Ohio's waters?

• septic tank runoff

• road salt runoff

• effluent from wastewater treatmemt plants

• soil erosion and sedementation

Tags

NGSS.HS-ESS2-5

NGSS.HS-LS2-7

The limiting nutrient in most freshwater systems (especially Lake Erie) is

• carbon

• phosphorus

• nitrogen

• potassium

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

In a stream ecosystem, which of the following fish would indicate the BEST water quality?

• Green sunfish, creek chub, common carp

• rainbow darter, stonecat madtom, logperch

• catfish, creek chub, northern pike

• freshwater drum, logperch, stonecat madtom

Which best describes vernal pools?

• No hydrologic inflows or outflows, dominated by sphagnum moss, acidic, very low nutrient ecosystem.

• Fed primarily by groundwater, dominated by sedges, cedars

• Nutrient rich, semi-permanently flooded, dominated by cattails

• Forested, seasonlly ponded, dominated by pin oaks, elms, red maples, amphibian breeding locations

Tags

NGSS.MS-LS2-5

In a river ecosystem, which of the following assemblages of benthic macroinvertebrates would indicate the best water quality?

• riffle beetle, black fly larva, scuds

• leech, dragonfly nymph, riffle beetle

• dragronfly nymph, pouch snail, fingernail clam

• scud, gilled snails, riffle beetles

Sometimes during timber harvesting operations it is necessary to cross a stream. What is the best place to cross a stream?

• At the point where two streams come together

• At a right angle or perpendicular to the banks

• Never cross a stream when water is present

• Where the stream bed is primarily made up of soil and sediment.

In a stratified lake, the water above the hypolimnion is

• denser

• more oxygenated

• less mixed

• colder

Tags

NGSS.MS-ESS2-4

Which of the followng is a poisonous water snake that is native to Ohio?

• Copperhead

• Lake Erie watersnake

• Water moccasin

• There are no poisonous water snakes native to Ohio

Light penetration in large lotic water bodies and all lentic waters are measured with what device?

• Eckman Sphere

• Secchi Disk

• Turbidity Plate

• Turbidity Disk