Describe and evaluate methods for measuring changes in abiotic and biotic components of an ecosystem along an environmental gradient. by Lee Ching Yan https://padlet.com/kcylee/expert4_ESS_ecotechnique Made with ♥ en-us 2017-03-18 07:54:01 UTC 2025-10-23 17:32:16 UTC hello@padlet.com Biotic components https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391182 Plants, insects, animals
Measuring tools: quadrat, grid quadrat]]> 2017-03-21 07:09:07 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391182 https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391183 - Growth rate
- Soil fertility
- Physical appearance]]> 2017-03-21 07:09:07 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391183 niiii https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391298 Abiotic factors:
-rain
-wind
-temp
-altitude
-soil
-sunlight
-pollution
-nutrients
-pH
-types of soil
-sunlight

]]> 2017-03-21 07:10:12 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391298 boubou evaluation https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391400 same method, instruments, etc. 
limitation:
- can never be measured at the same time
- biotic factors are hard to be measured]]> 2017-03-21 07:11:01 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391400 Environmental Gradient https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391533 A gradual change in one or more abiotic factors through distance, depth and time]]> 2017-03-21 07:12:22 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391533 Transect https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391842 -putting a line in the direction of the gradient and record all organism in touch

]]> 2017-03-21 07:14:57 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391842 Ecological gradients are often found where two ecosystems meet. Biotic and abiotic factors change and form gradients in which then can be recorded. All parts of the gradient needs to be sampled, so a transect is used. The simplest one is when a line of tape is layed down across the area wanted to be measured then to take samples of all the organisms touching the tape. Many transects should be taken to obtain quantitative data. A belt transect is used for bigger samples. https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391871 2017-03-21 07:15:10 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391871 https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391952 Tools:
- clinometer
- thermometer
- whirling psychrometer
- wind meter
- lux meter]]> 2017-03-21 07:15:46 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161391952 NIIIII https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161392143 Light Intensity --> light meter
soil moisture content --> weighing soil samples before and after drying
Wind speed --> use a digital anemometer. Cups on device resolve in wind, rotations per unit time are displayed.
Soil particle size --> measure them by putting the soil into a series of graduated sieves with diff. mesh sizes. clay ad slit can be measured with sedimentation.
Soil Mineral Content --> measured by loss-on-ignition (LOI) method. Weighed soil samples must be put into the oven and heated to v. high temp. for several hr so as to let the organic content of the soil burnt off. The loss in mass --> calculated once sample has reached mass that remains ( will not change) / no further change
slope--> water runoff influenced by slope and weather erosion is gna be a prob.
--> measured by using clinometer


]]> 2017-03-21 07:17:34 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161392143 line/belt transect https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161392430 line transect: only takes note of creatures that are on the line; investigation can be completed within a short time; but might not reflect the change in a big picture
belt transect: takes notes of a greater area, can obtain more info of the site; time consuming

]]> 2017-03-21 07:20:51 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161392430 place quadrats systamtatically --> on a line, bull transecting https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161396614 2017-03-21 07:49:00 UTC https://padlet.com/kcylee/expert4_ESS_ecotechnique/wish/161396614