Presentation on theme: "A Biosphere in a Bottle The Bottle Biosphere Project."— Presentation transcript:
1 A Biosphere in a BottleThe Bottle Biosphere Project
2 What is a BioBottle?A simplified ecosystem contained within a sealed, 2-3L soda bottle (“Closed Ecological System”)Can be terrestrial, aquatic or a combinationA student-designed, synthesis activity illustrating an understanding of biogeochemical cycles, food chains & webs, and energy transfer
3 The AssignmentEach group of two students must seal a clear container so that no matter can enter or leave it.The Goal is to include a community of organisms that is planned to balance each other in their chemical needs and waste products and to provide an energy flow from the light that enters the container to all living things insideThe test period will run for two weeksA formal, written report will be producedat the end of the experience consisting of:PlanConstruction MethodsCharts/DiagramsObservational RecordsConclusion
4 The PLAN Required prior to construction Must include: Type of container & method of sealing (hint: balloons make good lungs!)Type of environment (aquatic/terrestrial/combination)List of non-living componentsWater sourceNutrients addedBiotic components – must include at least one producer, consumer, and decomposer. Include numbers and sourceMost Important: Rationale for Success – discuss WHY you think you Bottle Biosphere will survive for two weeks once sealed. Discuss the needs of each organism and how those needs will be met. A labeled sketch is required at this stage and must be checked off before you may proceed to the Construction Phase
5 ConstructionNote the date of construction & date each organism is added. Plants may be started prior to addition of animals & sealingInclude as complete a list of organisms as possible, both macroscopic and microscopicProvide the source of each organism as a clue as to what other life forms may be “hitching a ride”. Also note if you rinsed the organisms prior to adding them to your biobottleRecord the condition of all organisms in your biobottleRecord the actual amount (mass, size or number) of each organism sealed into your biosphereExplain any modifications made from the original planDescribe you construction methods – how did you build the thing?!Include in the construction report anything else that you think is interesting as you build your system
6 Charts & DiagramsPurpose: to illustrate how life may be able to survive in your biosphereMust have at least two charts/diagramsEnergy Flow Chart – how light energy is converted to food energy and cycled through your biosphereBiogeochemical Cycle Chart – how materials found in living things cycle through the biotic and abiotic components of your biosphereEach diagram must be on unlined paper not less than 8.5x11 inches and not more than 18x24 inchesAll drafting and lettering should be neat and clearly readableLabeled, carefully drawn pictures of all organisms in your biosphere should be included in at least one of your diagramsColor is good!
7 Observational Records Careful, detailed and dated observational records are essential in analyzing what is going on inside your biobottle and evaluating the success of your designMake your 1st observation prior to sealing the container and then a second immediately after sealingThereafter, each member of the team will make a detailed observation every class day, or more often if you notice rapid changes within your biosphereEach observation should include a mention of each macroscopic organism and any changes in their quantity, size, condition and behaviorOther items to observe include the appearance of the water, soil, sediment and the sides of the biosphere
8 So what happened and what have you learned?? ConclusionSo what happened and what have you learned??First Part - a survey of what organisms are still alive, in what quantities, and in what conditionSecond Part - an explanation of facts that you learned from keeping a record of observationsThird Part – improvements and changes. How would you re-design your experiment a second time? What new information would you seek to gather? Give a reason for each change.
9 Construction of a multi-bottle Biosphere Advanced DesignConstruction of a multi-bottle BiosphereUsing multiple bottles to connect 2-3 biomesAquatic & TerrestrialWicks and screensSealing issues
10 Common Issues, Rules, and Questions Keep it simple!!No mammals, birds or poisonous organismsRemember the 10% ruleLots of decomposers in soil, but aquatics need natural sediments or gravel from a working fish tankNo “colonial” organisms (ants, bees, termites, etc)
11 Common Issues, Rules, and Questions (cont.) What do plants do at night??Be sure to leave some room in your bottle for an “atmosphere”What will be the relative humidity in your bottle? Are your organisms adapted to that?Where can you get your organisms?pet storesbait shopsself-collectedplant nurseries
12 Common Issues, Rules, and Questions (cont.) Do I fail if my bottle crashes?Do I have to open up my bottle at the end?What do I do with everything when the experiment is over?Can I take my bottle on the bus?Other questions??
13 What works well in a Bottle Biosphere? Students do the research!!Aquatics:anacharis/elodeaIndian waterweed (Hygrophila polysperma)seed snails (often on the anacharis)zebra danioscommon guppiesbetasa variety of algae-eaters with good growth of algae in bottle or anachariscritical – gravel from working fishtank or substrate from a natural source!Warning!! Many aquaria plants are non-native invasives. NEVER dispose of these plants (or any store-bought organisms) into the environment.
14 What works well in a Bottle Biosphere? Terrestrial:grassesdichondra & other ground coversthe “leafier” the plants, the better!isopods (roly-poly/pill bug)large variety of self-collected insectscrickets (must catch them if they escape. Do not want my room “chirps” for months ;-)worms (must have good drainage!)Remember 10% rule (avoid 3rd trophic level)Warning: High humidity level inside biobottles – crickets mold and moths stick to the sides!
15 BioBottle Equipment Construction Equipment: Lighting box cutters heavy-duty, clear box tapeaquarium silicone sealant(primarily for multi-bottle set-ups)small fishnetsplastic funnels with wide openings(for adding fish, etc to the bottles!)extra balloons/capspermanent markersLightingIndirect sunlightFluorescent Set-Up & Timers