Dissolved Oxygen –The distribution and dynamics of dissolved oxygen are important in aquatic systems because it controls the distribution, behavior, physiology,

Slides:

Advertisements

Similar presentations

Why Study Water Surface – Dirt Minerals Organic materials (any once living thing now decomposed Fertilizer Chemicals Anything spilled Ground – aquifers.

Advertisements

Dissolved Gases. Important Gases 6 important gases are dissolved in lakes, streams, seas 6 important gases are dissolved in lakes, streams, seas Nitrogen.

AP Lab #12 Dissolved Oxygen & Aquatic Primary Productivity part I

1 Carbon Cycle 9 Carbon cycle is critically important to climate because it regulates the amount of CO 2 and CH 4 in the atmosphere. Carbon, like water,

Density Stratification of Lakes

Nutrient Cycles Eutrophication Nitrogen –Chemical Forms in the Aquatic Environment –Chemical Transformations –Cycle f-ratio Carbon.

Human Influence on Ecosystems. Effects of Pesticides on Ecosystems Rachel Carson Silent Spring Birth of the Environmental Movement.

Dissolved Oxygen.

Aquatic Ecosystems Water has the ability to hold a large amount of energy. Due to this characteristic large bodies of water will take longer to heat up.

OXYGEN IN LAKES, STREAMS, AND RESERVOIRS. SOLUBILITY OF OXYGEN IN WATER RELATIVE TO PRESSURE.

Solubility - A property of matter. 1. Matter can be categorized by: Physical Property Does not show a change in the objects identity Chemical Property.

Phytoplankton Translates from Greek “free-floating plants”

Dr. Martin T. Auer MTU Department of Civil & Environmental Engineering ENVE5504 Surface Water Quality Modeling Lab 4. One-Dimensional Models Vertical Mass.

An Investigation on the Effects of Climate Change On Algal Blooms in Lake Champlain Patricia Brousseau, Lauren Chicote, John Keyes, Jenna Mandelbaum, Christopher.

Dr. Martin T. Auer MTU Department of Civil & Environmental Engineering Surface Water Quality.

Lecture goal: To identify and describe the properties of water that are most important to understanding broader patterns of habitat structure and ecology.

Lec 5: Gases (DO & CO2) and pH

Properties of Seawater Monday we talked about properties of water (Table 7.2) - dissolves solids and gases readily (“universal solvent”) Last time (Wednesday)

“What Is Lake Turnover?” Post-Reading Questions. 1. What times of year does turnover typically occur? Turnover usually occurs in the spring and fall.

Properties of Gas in Water Oxygen Sources and Sinks Oxygen Distribution (space & time) Measuring Dissolved Oxygen Measuring 1º Production and Respiration.

Water Chemistry: pH. pH pH is the measure of hydrogen ions (H+) –Negative logarithm of the H+ concentration Higher the pH, the lower the H+ concentration.

Temperature and DO Temperature  A measure of heat Dissolved Oxygen (DO)  The concentration of oxygen (gas) which is dissolved in water. Both are important.

Lab 12: Dissolved Oxygen Description –measure primary productivity by measuring O 2 production –factors that affect amount of dissolved O 2 temperature.

Pond Ecology.  Lakes and ponds are bodies of open standing water  Their physical conditions and life vary with distance from the shore.

Properties of Water. Water: 2 atoms of hydrogen, one of oxygen Held together by strong, covalent bond - electrons are ‘shared’ Water molecules interact.

Spring Lentic is describe as standing water habitats Inland depressions that hold water Range from 1 meter to 2000 meters Formation Glacial Retreat.

Ecology and Oceanography in the Gulf of Mexico

Nitrogen in Lakes and Streams Wetzel Chapter 12 pp Joe Conroy 12 April 2004.

Water Chemistry Project In order to evaluate water changes, we need access to reliable information on current and past conditions. If changes are already.

Water as an Environment Oxygen Profiles Light Part 2.

Ocean Chemistry  Chemical Properties  Physical Properties.

Lecture Ecology F Chapter 54 ~ Ecosystems and the Biosphere F Chapter 55 ~ Ecology and the Geography of Life.

Water Quality and Aquaculture Choose 2 Bodies of water n One that you think has poor water quality n One that you think has excellent water quality n.

1 State of San Lorenzo River Symposium Nicole Beck, PhD 2NDNATURE April San Lorenzo Lagoon A Decade of Dry Season WQ Monitoring.

Living organisms all interact with the physical world

Water as an Environment Light Water Movements Part 3.

Gases in Seawater The solubility and saturation value for gases in seawater increase as temperature and salinity decrease and as pressure increases. 1.

 The study of fresh bodies of water  Lentic: standing water (lakes and ponds)  Lotic: flowing water (streams and rivers)

INTRODUCTON TO WATER QUALITY IN AQUACULTURE Unit 4:

Ecology Review Jeopardy. The percentage of energy that is passed onto the next trophic level.

The Carbon Cycle. Carbon Dioxide and Carbonate system Why is it important? 1. Regulates temperature of the planet 2. Important for life in the ocean 3.

The Marine Environment1 How physical and chemical properties of water affect life in the sea.

Chapter 3 Part 2. Do Now 1) What is a thermocline 2) How does the graph look? (where are the axis and how are they labeled?) 3) What information do we.

Oxygen and CO 2 Announcements –Openings for canoe trip? –Exams will be passed back on Monday –Project proposals due this afternoon at 5 (my office!) –Include:

Using Data to Explore Ocean Processes Koshland Science Museum of the National Academy of Sciences.

Name: eee105 Password: prAIRie.

Eutrophication, Hypoxia, and Ocean Acidification Puget Sound Oceanography 2011.

Nutrients in sea water Introduction Distribution of Phosphorus and seasonal variation Distribution of nitrogen compounds Distribution of silicates and.

The Carbon Cycle. Carbon Dioxide and Carbonate system Why is it important? 1. Regulates temperature of the planet 2. Important for life in the ocean 3.

The Life Cycle of a Lake. Water Chemistry Basics Water freezes at 0° Celsius (32° Fahrenheit) Most substances get more dense as they get colder and less.

Pulsed emission of methane (CH 4 ) from a small eutrophic lake Arianto Santoso David Hamilton photo credit: Joint Conference.

Food web and microbial loop Eutrophic vs. Oligotrophic food webs

Freshwater Ecosystems Notes

Critical and Compensation Depths (refer to handouts from 9/11/17)

Freshwater Ecosystems

Part 2: Abiotic Factors affecting Aquatic Ecosystems Pg

Determination of dissolved oxygen free CO2, total alkalinity, total hardness, calcium, magnesium, ammonia, nitrate and phosphorus.

Lake Spokane 2012 Nutrient Monitoring Data

Abiotic Factors Affecting Aquatic Systems

Chemistry of Lakes What physical processes determine the structure of lakes? How does availability of gases, particularly oxygen, vary in lakes with depth.

Ocean Chemistry and Circulation

Chemistry of Lakes What physical processes determine the structure of lakes? How does availability of gases, particularly oxygen, vary in lakes with depth.

Factors Affecting Aquatic Ecosystems

Eutrophication : a major issue

Concentration and Solubility

Bärbel Müller-Karulis, Latvian Institute of Aquatic Ecology

Ecology Review Jeopardy

Aquatic Ecosystems.

ASPECTS OF AQUATIC REDOX CHEMISTRY

Presentation transcript:

Dissolved Oxygen –The distribution and dynamics of dissolved oxygen are important in aquatic systems because it controls the distribution, behavior, physiology, and growth of organisms. –sources of O 2 : atmosphere & photosynthesis –sinks: respiration & chemical oxidation

Properties of O 2 atmosphere ~ 21% O 2 ; ~ 79% N 2 oxygen is more soluble in water than nitrogen solubility increases as temperature decreases equilibrium concentration increases with pressure solubility declines exponentially with increased salinity

Dimixis in Mountain Lake, Virginia A.spring turnover B. spring stratification C. summer stratification D. fall turnover E. inverse stratification under winter ice

Distribution of O 2 in Lakes orthograde O 2 profile 1.oligotrophic lakes: low nutrients & productivity 2.O 2 regulated by physical means e.g. spring mixing 3.100% saturation with depth

clinograde O 2 profile 1.eutrophic lakes: high nutrients & productivity 2.loss of O 2 through biological oxidation of organic matter 3.hypolimnetic O 2 depleted after summer stratification

metalimnetic O 2 maxima & minima Phytoplankton Zooplankton