I B* Discussion
usually 1- 2 metres below the soil surface The third site (NO 129 map ref,
NO, 465266, fig, II/1) was by the side of a loch and was regularly flooded in
the winter. The trees on the first two sites were Pinus sylvestris and on the third site they were Picea abies.
Initially, samples were collected both from the roots and from the base of trunks (using a tree borer). Tv/o sets of cores were taken, one set being placed directly into perchloric acid in McCartney bottles, and the other set being placed into empty dry McCartney bottles, (All sets were later extracted in perchloric acid). These three sets of samples were taken so that results of each could be compared. This was to ascertain whether the last mentioned method, that is, the simplest, would suffice, since the aim was to find the simplest method of field collection which could be used to attain equally informative results. As a result of this comparison, the remainder of the study was con tinued by collecting wood core samples directly into dry McCartney bottles.
Fig. Il/j
Tentsmuir Forest, Fife, showing drainage and depth of water table. Site numbers are the upper numbers in each pair. Sites where samples of wood cores were taken, are arrowed (sites 56» 48 and 129,).
Tentsmuir Forest, Fife
FERRYPOR
NATURAL \D€PTH T0 \ DTPTH TO ORA/MAO t d is t in c t ArATTR CLASS NtOTLING TABLC CINS)
Fig, II/2
Tentsmuir Forest, Fife, showing tree species grown» Key:
SP — Scots F ■’‘ne (pinus sylvestris) CP — Corsican Pine (Pinus nigra) LP Foigepole Pine (pinus contorta) ÎT3 — Norway Spruce (picea ahies)
S3 — Sitka Spruce (picea sitchensis)
(The number following >P’ on the map indicates the year of planting)
Fig. II/3
Correlation between ethanol levels in trunk wood cores, and root samples, of Pinus sylvestris and'Picea abies,
(wood core samples collected directly into 6^0 perchloric acid)
Correlation (r) = 0,83
P = 0,01
Each plot represents the comparison between a wood core and a root sample collected from the same tree.
% 00 Oo -P oo u <yo ■p & T3 W iH I P 0) 1'
Pig.
II/4
Correlation between ethanol levels in wood cores of
Pinns sylvestris and Picea abies collected either "dry"- in an airtight container, or directly into 6^0 perchloric acid in a similar container.
Each plot represents the comparison between two cores collected-from the same tree.
Correlation coefficient (r) - 0,84
Ethanol content of wood-cores from Tentsmuir, Fife ■I ■ I ■ I ■ ’i
I
i
correlation coef. (r) = 0.84 0.5 1 .0 AFig. II/5
Monthly levels of ethanol ()]M ethanol/g dry wt. of wood core), detected in wood cores from the base of trunks of mature trees of Picea abies and Pinus sylvestris growing
at Tentsmuir, Fife.
® Picea abies growing in wet site with prolonged winter flooding, Morton lochs (site 129)
A
Pinus sylvestris growing on a former dune slack (site 36)A Pinus sylvestris growing on an ancient sand dune, Kinshaldy (site 48)
Error bars are based on ten separate estimates using two samples from each of five trees.
'S
Ethanol detected in wood cores from Tentsmuir throughout the year
Pinus sylvestris 1,0 -
0,8 -
0,6-
+»
Months from December 1975 to November 1976
H o 2,0
s
^
1 . 8 -P 0> Picea abies 0,8 0 ,6 - 0,4 " 0,2 - J F D M A M J J A S 0 NFig. II/6
Gra,phs of a) Temperature C, b) Rainfall (cms) a>nd depth of water table below the soil surface (cms), at Tentsmuir, Fife.
Temperature C, rainfall (cms) and depth of water table (eras) throughout the year at Tentsrauir, Fife# (a) 20 15 10 5 O cms 15
(b)
12 9 6 3o
J
F M A M J J A S O D N D soil surface 20-Pig. II/7
Monthly levels of ethanol (jiM ethanol/g dry wt), de- tected in wood cores from the base of trunJ^s of mature trees of Picea abies growing at Morton lochs (site 129) Tentsmuir, Fife,
Each graph represents the levels of ethanol detected in each of -five individual trees. Each point is based on the mean of two estimates found using two core samples from each tree.
Individual tree data from Picea abies Morton Lochs (site 129)
1
.
0"
0.5' 2.0 0.5 ■;! 2.0- 2.5'g:%
Fig, II/8
Monthly levels of ethanol (yiM ethanol/ g dry wt) detected in wood cores from the hase of trunks of mature trees of Pinus sylvestris growing on a former dune slack (site ^6) Tentsmuir, Fife,
Sach graph represents the levels of ethanol detected in each of five individual trees, Each point is based on the mean of two estimates found using tv^o core samples from each tree.
Vertical bars show maximum and minimum values recorded.
Prior to May the trees at this site were sampled randomly therefore data for individual (marked) trees is only available from May 1976 onwards.
Individual tree core data from
Pinus sylvestris , former dune-slack (site 3 6 ) 1. 0 7
o
H T X W T T T M J JX
7 ¥Fig. II/9
Monthly levels of ethanol (pM ethanol/g dxy wt)
detected in wood cores from the base of trunks of mature trees of Pinus sylvestris growing on an ancient sand dune
(site 48) at Kinshaldy, fentsmuir, Fife,
Each graph represents the levels of ethanol detected in each of five individual trees. Each point is based on the mean of two estimates, found using two core samples from each tree.
Vertical bars show maximum and minimum values recorded.
Prior to I4a.y, the trees at this site were sampled randomly, therefore data for individual (marked) trees is only available from Hay 1976 onwards.
Individual tree core data from