Plant Transpiration In The Cloud Forest
Name:Section:Date:PLANT TRANSPIRATION IN THE CLOUD FORESTTranspiration IntroductionTranspiration is the loss of water from the leaves of plants. Stomates are tiny pores on the surface ofleaves that allow for the passage of oxygen and carbon dioxide during photosynthesis. You may haveseen these tiny openings while looking at the leaves on your desk with the microscope. The stomatesalso allow water molecules to pass through. About 90% of the water a plant loses escapes through thestomates. For each molecule of water that evaporates from a leaf by transpiration, another molecule ofwater is drawn in at the root to replace it. Lack of water causes the stomates to close and preventfurther dehydration of the plant. Transpiration is a safe process for plants, as long as the roots canabsorb water molecules at the same rate they are being lost from the leaf surfaces.There are many environmental conditions that change the rate of photosynthesis and, in turn, the rateof transpiration. Light intensity changes the rate of photosynthesis and also changes the temperaturearound the plant. The greater the light intensity and temperature, the more water is lost from leafsurfaces. Humidity also plays a role in transpiration – drier air makes evaporation of water faster. Thepresence and intensity of wind also plays a large role in transpiration rate because it changes thehumidity of the air surrounding the plant, replacing moist air with drier air. The amount of moisturepresent in the soil will affect transpiration as well. When water from the soil is unavailable, stomateswill close in an attempt to retain water. Finally, different species of plants transpire at different rates.Those plants adapted to live in very arid conditions, such as cacti, will conserve water by reducingtranspiration, but species such as the leafy liverwort that grow in very wet areas like the cloud forestcan transpire continually without desiccation.What is transpiration?What are the environmental factors that can affect transpiration?Think about the plants that you see outside the window right now. Do you think they are experiencinga lot of transpiration right now? Why or why not?1
Name:Section:Date:PLANT TRANSPIRATION IN THE CLOUD FORESTStation WorksheetDirections: You will be visiting four different stations that contain information and data collected fromthe cloud forest ecosystem of Monteverde, Costa Rica. Find the section of the worksheet that matchesthe station you are working at. Answer the questions provided. It may be helpful to have theTranspiration Introduction handout with you and use it to help you write informed answers.STATION #1 PLANT WATER STRESS1) Examine the PLANT WATER STRESS data and graph. Write a two to three sentencestatement that summarizes the information.2) At which location are the plants experiencing the lowest rate of transpiration? Explain yourchoice.3) Looking at the data, do you think plants in the cloud forest ecosystem are experiencing thesame rate of transpiration throughout the day? Why or why not?4) What environmental condition(s) might change the rate of transpiration throughout the day?2
Name:Section:Date:STATION #2 SOIL MOISTURE1) Examine the SOIL MOISTURE data and graph. Write a two to three sentence statement thatsummarizes the information.2) At which location are the plants experiencing the greatest rate of transpiration? Explain yourchoice.3) Which environmental condition(s) might play a role in transpiration in this situation?STATION #3 ANNUAL RAINFALL1) Examine the ANNUAL RAINFALL data and graph. Write a two to three sentence statementthat summarizes the information.2) At which location are the plants experiencing a greater rate of transpiration? Explain yourchoice.3) Which environmental condition(s) might play a role in transpiration in this situation?3
Name:Section:Date:STATION #4 TRANSPIRATION & CLOUD FORESTExamine the Canopy In The Clouds media below. Write down important information regardingtranspiration and the cloud forest ecosystem that you learn from each piece of media. If you findadditional hotspots that are helpful, record the location and information so you can refer to it againlater, if needed.MediaImportant InformationPanorama #1 Canopy Hotspot #1Panorama #4 Hotspot #3Panorama #5 Hotspot #3Additional MediaVideo “Drip Tips”4
Name:Section:Date:PLANT TRANSPIRATION IN THE CLOUD FORESTStation Data & GraphsPLANT WATER :000:002:004:00PLANT WATER STRESS LEVELSLow Elevation (Pano #1) Mid Elevation (Pano .3440.4040.3280.444High Elevation (Pano 0.2040.185
Name:Section:Date:Plant Water StressHigh # More Water Stress1.41.2Stess level10.8Low Elevation (Pano #1)Mid Elevation (Pano #2)High Elevation (Pano 022:000:002:004:00TimeSOIL MOISTURESOIL MOISTURE IN THE CLOUD FORESTLocation% Soil MoistureLow Elevation8.2Panorama #1Mid Elevation10.3Panorama #2High Elevation58.4Panorama #36
Name:Section:Date:Soil Moisture in the Cloud Forest7058.460% Soil Moisture504030208.21010.30Low Elevation (Pano #1)Mid Elevation (Pano #2)High Elevation (Pano #3)ANNUAL ryFebruaryMarchAprilMayJuneJulyAugustANNUAL RAINFALL (mm)Low Elevation (Pano High Elevation (Pano 8275.9312.57
Name:Section:Date:Annual Rainfall1000900800600Low Elevation (Pano #1)500High Elevation (Pano #3)400300200100AugustlyJuneJuayMri ber0Semm of Rainfall700Month8
Name:Section:Date:PLANT TRANSPIRATION IN THE CLOUD FORESTTranspiration & Water Student AssessmentDirections: Answer the questions below regarding transpiration and the cloud forest.1) What is transpiration? Explain your answer using scientific vocabulary.2) Examine Panorama #1, Canopy Hotspot #1. What environmental factor is influencingtranspiration here? Do you think the plants in this location are transpiring at a high or low rate?Why?3) Examine Panorama #2, Canopy Hotspot #1. What environmental factor is influencingtranspiration here? Do you think the plants in this location are transpiring at a high or low rate?Why?4) Examine Panorama #5, Hotspot #1. What environmental factor is influencing transpirationhere? Do you think the plants in this location are transpiring at a high or low rate? Why?5) Discuss the relationship between water in an ecosystem and transpiration in plants. How doesone impact or influence the other? Use examples from the cloud forest or your local ecosystemto help explain your thoughts.9
Transpiration is the loss of water from the leaves of plants. Stomates are tiny pores on the surface of leaves that allow for the passage of oxygen and carbon dioxide during photosynthesis.
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Silat is a combative art of self-defense and survival rooted from Matay archipelago. It was traced at thé early of Langkasuka Kingdom (2nd century CE) till thé reign of Melaka (Malaysia) Sultanate era (13th century). Silat has now evolved to become part of social culture and tradition with thé appearance of a fine physical and spiritual .
Transpiration occurs through young or mature stem is called as Cauline transpiration. Depending upon the plant surface, transpiration is classified into three types: Water vapour diffuses out through minute pore (stomata) present in soft aerial part of plant is known as Stomatal Transpiration Stomatal Transpiration
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Transpiration Rates Transpiration depends on concentration gradients in the same way that mass flow does The driving force of transpiration is the "vapor pressure gradient." This is the difference in vapor pressure between the internal spaces in the leaf and the atmosphere around the leaf Factors affecting rate of transpiration
Transpiration Pull This is the main force that causes water to move up the stem against the force of gravity. Transpiration is the loss of water in the form of water vapour through the aerial parts of a plant through stomata Experiment to demonstrate that transpiration occurs through the aerial parts of a plant
