eco - Staple in this corner © James E Mickle and Patricia...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Staple in this corner © James E. Mickle and Patricia M. Aune 2009 Name E-mail address Mailing Address Ecology Objective 1. Conduct an experiment to test allelopathy between wheat and rye seeds. 2. Compare and contrast two ecosystems in detail. Before Lab : Read Chapters 34 and 36 in Campbell et al. , Biology: Concepts and Connections , 2 nd or 3 rd or 4 th ed. or Chapters 34 and 37 in the 5 th or 6 th ed. Turn in: The entire lab unit. You will need to turn in four photographs. Introduction No organism exists on its own in a void. All organisms must have exchanges and interactions with their surroundings, or environment, including the nonliving environment and with other living organisms. For example, a plant growing in a field must have an outside source of carbon dioxide, releases oxygen gas, takes in nutrients from the soil, may have some of its leaves eaten by a caterpillar, fend off attacks by fungi, be shaded by plants growing around it, and be pollinated by an insect with pollen from another plant growing near it. Ecology is the study of these interactions between organisms and their environment, both living and nonliving. We will study two aspects of these interactions in this lab. In Activity A, we will look at a mechanism involved in competition called alleleopathy, and in Activity B we will compare two ecosystems, looking at the similarities and differences of the overall environment in which organisms exist. Special Preparation: In the kit: Activity A: Ecosystem Comparison Soil test kit 4 Flag markers (in bottom of kit box) 2 Screw top plastic jars 2 Small zip lock bags (for soil type 1, soil type 2) String 12 meters long (marked at 3 meter intervals) 25 and 100 ml Graduated cylinder (Master Kit) 6 Deep Petri dish halves (to catch water with pots)(Master Kit) Small forceps/tweezers (Master Kit) Dissecting needles (Master Kit) Ruler (Master Kit) Activity B: Wheat and Rye Wheat seeds (70+) Rye seeds (70+) 3 Deep Petri dishes (Master Kit) Ruler (Master Kit) Forceps (Master Kit) BIO 106 Distance Learning 2 Ecology 2 Dissecting needles (Master Kit) You will need to provide: Small shovel or a spade to dig 4" Water 2 Clear Plastic Cups Aluminum foil OR cloth to cover petri dishes Calculator to average shoot length of rye and wheat seedlings Measuring/Observations: 1. Wheat and Rye: Observe wheat and rye seeds so that you can tell them apart. Seeds will grow for 1 week before you record your results. You will need to check the seed dishes each day and water as needed. 2. Comparison of Two Ecosystems You will need to make measurements and observations in the field. Solutions to prepare: none NOW you are ready to start the activity: Activity A Allelopathy Between Wheat and Rye Seeds Allelopathy is the secretion of a substance by an organism that inhibits other organisms. This is a mechanism to decrease competition by reducing the number of surrounding organisms. In other words, allelopathy is a way to eliminate the competition by chemical warfare. For example, plants words, allelopathy is a way to eliminate the competition by chemical warfare....
View Full Document

This note was uploaded on 06/24/2009 for the course BIO 106 taught by Professor Flick during the Spring '08 term at N.C. State.

Page1 / 14

eco - Staple in this corner © James E Mickle and Patricia...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online