Table 1 Open in new tab Comparison of...

Table 1

Comparison of environmental conditions of the nine plots of the study. Temperature values(T_air) are means over 15 days with simultaneous measurements in all plots. Data on PPFD were recorded between 12:00 and 14:00 h on two sunny days, one in August (dry season) and one in January (wet season).

Treatment	Plot^a	T_air day (°C)	T_air night (°C)	PPFD, dry season, mid-day (μmol m⁻² s⁻¹)	PPFD, wet season, mid-day (μmol m⁻² s⁻¹)	Light transmission (%), on dry/wet season days
Open field	Open 1	24.2^b	16.1^b	1970	2059	100/98
	Open 2	24.2^b	16.1^b	1806	2044	95/97
	Open 3	24.2^b	16.1^b	1990	1979	98/95
Sparse canopy	Cm	21.2	18.0	853	789	42/38
	Dg	21.3	15.5	670	138	31/7
	Pa	22.1	15.2	932	409	43/19
Dense canopy	Cg	21.6	17.8	258	179	13/9
	Mb	21.6	17.7	216	278	11/13
	Sg	21.4	16.6	233	117	11/6

Treatment	Plot^a	T_air day (°C)	T_air night (°C)	PPFD, dry season, mid-day (μmol m⁻² s⁻¹)	PPFD, wet season, mid-day (μmol m⁻² s⁻¹)	Light transmission (%), on dry/wet season days
Open field	Open 1	24.2^b	16.1^b	1970	2059	100/98
	Open 2	24.2^b	16.1^b	1806	2044	95/97
	Open 3	24.2^b	16.1^b	1990	1979	98/95
Sparse canopy	Cm	21.2	18.0	853	789	42/38
	Dg	21.3	15.5	670	138	31/7
	Pa	22.1	15.2	932	409	43/19
Dense canopy	Cg	21.6	17.8	258	179	13/9
	Mb	21.6	17.7	216	278	11/13
	Sg	21.4	16.6	233	117	11/6

Light transmission is the plot radiation divided by the open sky radiation at a large open area 50 m outside the Arboretum of Ruhande.

^aOpen 1, 2 and 3 are the open plots; Cm, Dg and Pa are the sparse canopy plots with overstorey consisting of Croton megalocarpus, Dombeya goetzenii and Prunus africana; Cg, Mb and Sg are the dense canopy plots with overstorey consisting of Carapa grandiflora, Magnistipula butayei and Syzygium guineense.

^bData from the same weather sensor.

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