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quadrat-sampling

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Journal Articles
The American Biology Teacher. 2019; 818561–567 doi: https://doi.org/10.1525/abt.2019.81.8.561
Published: 01 October 2019
... a typical backyard. To test this, we utilized random quadrat sampling in both habitats using flashlights to detect nocturnal eyeshine. Students obtaining similar results would likely have concluded that wolf spiders were more abundant in natural habitats. SLO 1...
Journal Articles
The American Biology Teacher. 2019; 819680–685 doi: https://doi.org/10.1525/abt.2019.81.9.680
Published: 01 December 2019
...)............................4.217-E, 6.442-I, 6.442-OL, 7.507-I Protein structure............................6.423-I Public health............................6.412-I Purines............................3.193-TT Pyrimidines............................3.193-TT Quadrat sampling............................8.561-I...
Journal Articles
The American Biology Teacher. 2018; 807501–519 doi: https://doi.org/10.1525/abt.2018.80.7.501
Published: 01 September 2018
Journal Articles
The American Biology Teacher. 2017; 799746–752 doi: https://doi.org/10.1525/abt.2017.79.9.746
Published: 01 November 2017
... (Equation 1) When students were asked in class to solve Equation 1 for c eq , they found that it is quadratic with solution: A 500 = ε × c e q = ε × a 0 + b 0 + K D − ( a 0 + b 0 + K D ) 2 − 4 a 0 b 0 2...
Journal Articles
The American Biology Teacher. 2017; 79110–13 doi: https://doi.org/10.1525/abt.2017.79.1.10
Published: 01 January 2017
... creates 100 quadrats, each 1 m 2 in area, creating a 10 × 10 plot. In random order, she then removes 1 kg of soil from the center of each quadrat and stores and labels the samples in separate containers. When back at the lab, the student counts the number of pill bugs in each sample, and the data set...
Journal Articles
The American Biology Teacher. 2016; 789733–738 doi: https://doi.org/10.1525/abt.2016.78.9.733
Published: 01 November 2016
... be sampled to determine the number of “species” and their abundance. Following the placement of transects, students can utilize a quadrat sampling method of their choice to sample for “biodiversity” (i.e., count the number and type of jelly beans they find). Two simple approaches for students are...
Journal Articles
The American Biology Teacher. 2017; 79128–34 doi: https://doi.org/10.1525/abt.2017.79.1.28
Published: 01 January 2017
..., the students census permanent quadrats in both the treatment area and the natural savanna. They experience the unique long-leaf pine and wiregrass ecosystem and learn about basic ecological fieldwork techniques, plant taxonomy, and restoration science. More importantly, we use this project to...
Journal Articles
The American Biology Teacher. 2015; 777532–537 doi: https://doi.org/10.1525/abt.2015.77.7.8
Published: 01 September 2015
... our site runs parallel to and 5 m south of Warren Woods Road. The western boundary is 20 m from a field edge. The eastern and southern boundaries are the edge of a slope down to the Galien River.… In 1980 we sampled 25 quadrats of 100 m 2 in the same approximate area studied by Cain (1935). Trees...
Journal Articles
The American Biology Teacher. 2011; 73135–38 doi: https://doi.org/10.1525/abt.2011.73.1.7
Published: 01 January 2011
... author). Figure 1. Echinacea angustifolia seedling (near pencils; picture by author). Figure 2. Searching for seedlings in a 1-m2 quadrat (picture by author). Figure 2. Searching for seedlings in a 1-m2 quadrat (picture by author). Figure 3. Echinacea angustifolia head with...
Journal Articles
The American Biology Teacher. 2008; 709550–553 doi: https://doi.org/10.2307/27669341
Published: 01 November 2008
... the size, shape, and location of the SUs. Over a century ago, two University of Nebraska graduate students (Roscoe Pound & Frederick Clements, 1898) cham pioned the use of the quadrat in plant community analysis. This is basically a square meter frame placed either randomly or systematically on the...
Journal Articles
The American Biology Teacher. 2004; 669613–619 doi: https://doi.org/10.2307/4451758
Published: 01 November 2004
... from ecology with a good deed for the community. Three ecological concepts are inves- tigated: density, frequency, and biomass. The method, a random sampling technique for estimating species numbers using transects and quadrats, is the most com- monly used in ecological studies of plant geography and...
Journal Articles
The American Biology Teacher. 2006; 684213–220 doi: https://doi.org/10.2307/4451969
Published: 01 April 2006
... boundaries. This is important since it helps the students remain oriented within the plot. We used a I m2 quadrat for collecting data from five subplots within each plot, one at all four corners and one at the center of the plot (Figure 2). The subplots were constructed of light-weight PVC pipes and angles...
Journal Articles
The American Biology Teacher. 2006; 68124–27 doi: https://doi.org/10.2307/4451921
Published: 01 January 2006
... linear elationship to carbon dioxide concen- tration.The line fitted to the curve is quadratic. BASICS & ACIDICS 27 ...
Journal Articles
The American Biology Teacher. 2004; 662120–127 doi: https://doi.org/10.2307/4451637
Published: 01 February 2004
..., did not confirm that the fourth- power relationship between pipe diameter and conduc- tivity was better than a cubic relationship, but did show that the relationship between conductivity and xylem diameter was not linear or quadratic. We obtained similar results for leaf area as a func- tion of...
Journal Articles
The American Biology Teacher. 1999; 618564 doi: https://doi.org/10.2307/4450769
Published: 01 October 1999
... Paso. They are surrounded by desert, but few have ever experienced it. Some of the most profound teaching experiences I had there involved taking students on a simple field trip to undisturbed desert and showing them how alive it is. No quadrats, no sampling. Just show and tell. This single experience...
Journal Articles
The American Biology Teacher. 1999; 618562–564 doi: https://doi.org/10.2307/4450768
Published: 01 October 1999
... recently taught college students in El Paso. They are surrounded by desert, but few have ever experienced it. Some of the most profound teaching experiences I had there involved taking students on a simple field trip to undisturbed desert and showing them how alive it is. No quadrats, no sampling. Just...
Journal Articles
The American Biology Teacher. 1995; 573174–176 doi: https://doi.org/10.2307/4449956
Published: 01 March 1995
... field environments in natural ecosys- tems. Field Activities Materials Needed for Field Sampling Metric tapes Shovel- 1.5 meters Meter sticks Wooden stakes for making quadrats Handouts for data collection Plastic Ziploc? bags, quart and gal- lon sizes PlexiglasO tubes (3.2-cm diameter) Cans for...
Journal Articles
The American Biology Teacher. 1992; 545276–283 doi: https://doi.org/10.2307/4449478
Published: 01 May 1992
... distri- butions of flora in quadrats on lava and pyro- clastic flows dating from 1968 to the present as well as the last eruption cycle (ca. 1500 AD) 3. Collecting volcanic ash durinA eruptions from various locations to analyze water and nutrient contents. In addition, I supervised the initial planning...
Journal Articles
The American Biology Teacher. 1989; 518482–486 doi: https://doi.org/10.2307/4448994
Published: 01 November 1989
... paired comparisons should indicate which unit has the greater dispersal potential. One ad- vantage of this method of analysis is that it allows the use of the sector quadrat sampling technique which re- quires much less effort to set up and fewer quadrats. Though more time-consuming, a grid of equal-area...
Journal Articles
The American Biology Teacher. 1992; 54116–18 doi: https://doi.org/10.2307/4449389
Published: 01 January 1992
... in field journals, collect or photograph specimens, study plant ecology and communities, construct a study area and set up quadrats and transects, and study the major groups of plants. This sophisticated but clearly written guide provides many excellent ideas for tak- ing the botany class outside...