Floristic Diversity and Distribution Pattern of Plant Communities along Altitudinal Gradient in Sangla Valley, Northwest Himalaya

Table 3

Identified communities showing TBA, species richness, densities, and diversity in Sangla Valley.

Communities	SR	TBA (m^2/ha)	Species richness	Density			Species diversity index (′)
				Trees (no./ha)	Shrubs (no./ha)	Herbs (no./m^2)	Trees	Shrubs	Herbs
Trees
BU	5	11.17	47	480	330	35.16	0.73	2.12	3.17
CD	3	42.41	38	403.33	673.33	33.44	0.57	1.68	3.62
QF	1	14.17	19	340	290	22.08	0	0.4	2.49
PG	3	12.09	47	490	606.29	35.20	0.82	1.16	3.11
PW	6	8.702	96	205	625.83	36.34	0	2.38	4.01
BU-AP	1	14.16	35	440	770	25.03	1.02	1.52	3.16
BU-PW	4	12.28	80	420	327.5	40.36	0.93	2.22	3.69
CD-PS	1	17.98	41	600	1030	42.40	1.28	2.07	2.98
CD-PW	1	21.99	29	400	420	38.20	0.69	0.95	3.07
Shrubs
HS	2	—	41	—	370	45.39	—	1.63	3.21
RA	2	—	40	—	105	32.56	—	0.96	3.45
RA-SC	2	—	52	—	230	34.80	—	1.15	3.55
SCa-CB-BJ	1	—	34	—	540	48.73	—	1.53	2.87
SCa-LH	1	—	33	—	630	27.70	—	1.43	3.1
Herbs
PA-AS-BA-AV	1	—	34	—	—	78.95	—	—	2.91

SR = site represented, TBA: total basal area, Ind = individual, BU = Betula utilis, CD = Cedrus deodara, QF = Quercus floribunda, PG = Pinus gerardiana, PW = Pinus wallichiana, BU-AP = Betula utilis-Abies pindrow mixed, BU-PW = Betula utilis-Pinus wallichiana mixed, CD-PS = Cedrus deodara-Picea smithiana, CD-PW = Cedrus deodara-Pinus wallichiana mixed, HS = Hippophae salicifolia, RA = Rhododendron anthopogon, RA-SC = Rhododendron anthopogon-Salix caliculata mixed, SCa-CB-BL = Spiraea canescens-Cotoneaster bacillaris-Berberis jaeschkeana mixed, SCa-LH = Spiraea canescens-Lonicera hypoleuca mixed, and PA-AS-BA-AV = Poa alpina-Agrostis stolonifera-Bistorta affinis-Aconitum violaceum.