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MiniWinkler transect, 1 June 2004
On 1 June 2004, a MiniWinkler transect was sampled, to parallel similar samples taken on the Barva Transect as part of ALAS IV. We attempted to follow as closely as possible the "miniWinkler" method of Fisher (1999). A 250m long straight-line transect was flagged at 5m intervals. The transect was subjectively oriented. After a period of 24hrs with no rain, a sample was taken at each flagged spot on the transect. A one square meter area was delimited, and the litter and dead wood inside was aggressively minced with a machete. Litter was sifted until all the litter in the plot was sifted or 2l of siftate was obtained, whichever came first. When there was more than enough litter to produce 2l of siftate, the different kinds of litter in the plot (e.g. leaves on soil versus litter from a rotten log) were subsampled so that all were represented (a somewhat subjective process that attempted to include the diversity of litter types found in one plot). The plots were delimited by eye, and in practice the actual area sifted varied from 60x60cm to 1x1m. The siftate was returned to the ALAS lab and hung in Winkler bags for three days. Arthropods were collected directly into whirlpac bags of 95% ethanol.
The beginning point of the transect was in the successional plots and from there went at a compass bearing of 270 degrees. It crossed the Sendero Holdredge and continued in mature forest.
The data fields, in order, are:
Collection code: a unique code for a collection. The "WF" indicates it is a miniWinkler sample, the following two numbers are the transect number, and the final two-digit number is the serial position along the transect, from 01 to 50.
Collection date: day the sample was collected from the field, in format day-month-year.
X and Y coordinates: La Selva GIS coordinates.
WF/01/01 1-Jun-04 954 1842
WF/01/02 1-Jun-04 957 1838
WF/01/03 1-Jun-04 960 1834
WF/01/04 1-Jun-04 962 1829
WF/01/05 1-Jun-04 965 1825
WF/01/06 1-Jun-04 968 1821
WF/01/07 1-Jun-04 971 1817
WF/01/08 1-Jun-04 973 1813
WF/01/09 1-Jun-04 976 1809
WF/01/10 1-Jun-04 979 1804
WF/01/11 1-Jun-04 982 1800
WF/01/12 1-Jun-04 984 1796
WF/01/13 1-Jun-04 987 1792
WF/01/14 1-Jun-04 990 1788
WF/01/15 1-Jun-04 993 1784
WF/01/16 1-Jun-04 995 1779
WF/01/17 1-Jun-04 998 1775
WF/01/18 1-Jun-04 1001 1771
WF/01/19 1-Jun-04 1004 1767
WF/01/20 1-Jun-04 1006 1763
WF/01/21 1-Jun-04 1009 1759
WF/01/22 1-Jun-04 1012 1754
WF/01/23 1-Jun-04 1015 1750
WF/01/24 1-Jun-04 1017 1746
WF/01/25 1-Jun-04 1020 1742
WF/01/26 1-Jun-04 1023 1738
WF/01/27 1-Jun-04 1026 1734
WF/01/28 1-Jun-04 1028 1729
WF/01/29 1-Jun-04 1031 1725
WF/01/30 1-Jun-04 1034 1721
WF/01/31 1-Jun-04 1037 1717
WF/01/32 1-Jun-04 1039 1713
WF/01/33 1-Jun-04 1042 1709
WF/01/34 1-Jun-04 1045 1704
WF/01/35 1-Jun-04 1048 1700
WF/01/36 1-Jun-04 1050 1696
WF/01/37 1-Jun-04 1053 1692
WF/01/38 1-Jun-04 1056 1688
WF/01/39 1-Jun-04 1059 1683
WF/01/40 1-Jun-04 1062 1679
WF/01/41 1-Jun-04 1064 1675
WF/01/42 1-Jun-04 1067 1671
WF/01/43 1-Jun-04 1070 1667
WF/01/44 1-Jun-04 1073 1663
WF/01/45 1-Jun-04 1075 1658
WF/01/46 1-Jun-04 1078 1654
WF/01/47 1-Jun-04 1081 1650
WF/01/48 1-Jun-04 1084 1646
WF/01/49 1-Jun-04 1086 1642
WF/01/50 1-Jun-04 1089 1638
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