Table 1. An overview of Syrian Pinus brutia and Cupressus sempervirens study populations, incl. population type, geographic location, climatic conditions, population area, seed weight and percentage of seed viability, empty seeds and degraded embryos before the start of the experiment.
Population	Population type	Lat.	Long.	Alt.	MAT	Precip.	Population area (ha)	Seed weight (g) (n = 300 seeds)	Seed viability	Empty seeds	Degraded embryos
Pinus brutia
Latakia 1	Natural	35.776	35.902	143	18.38	1025	-	12.39	77%	0%	23%
Latakia 2	Natural	35.810	35.921	271	17.98	1085	-	16.138	70%	0%	10%
Latakia 3	Natural	35.815	35.972	425	17.98	1085	-	16.057	65%	0%	22.5%
Aleppo Mt 1	Natural	36.634	37.037	752	16.32	525	-	15.627	88.5%	1.4%	18.5%
Aleppo Mt 2	Natural	36.660	37.060	826	16.68	499	-	15.998	82%	0%	18%
Aleppo Mt 3	Natural	36.621	37.011	632	16.57	499	-	16.560	93%	0%	6.7%
Aleppo 1	Afforested	36.257	38.003	364	17.80	248	110	15.883	78%	0%	12%
Aleppo 2	Afforested	36.257	37.557	392	17.76	289	105	15.813	80%	0%	8.5%
Aleppo 3	Afforested	36.427	37.921	539	17.20	290	68.5	13.141	80%	0%	10%
Deir Ezzor 1	Afforested	35.244	40.035	238	19.54	166	9.6	10.093	75%	0%	20%
Raqqa	Afforested	35.970	39.022	312	18.61	183	40	13.033	75%	0%	15%
Cupresssus sempervirens
Latakia 1	Natural	35.887	35.898	130	18.38	1025	-	2.627	57%	0%	40%
Latakia 2	Natural	35.919	35.916	450	17.98	1085	-	2.289	57%	0%	41%
Latakia 3	Natural	35.823	35.962	539	17.98	1085	-	2.827	61%	0%	37%
Aleppo 1	Afforested	36.426	38.009	540	17.80	248	110	2.483	57.5%	1.8%	29%
Aleppo 2	Afforested	36.440	37.809	535	17.76	289	105	1.785	69%	0%	13%
Aleppo 3	Afforested	36.508	37.962	474	17.68	295	1.5	2.086	49%	0%	43%
Deir Ezzor 1	Afforested	35.406	40.059	238	19.54	166	9.6	1.711	22.4%	8.6%	48.3%
Deir Ezzor 2	Afforested	35.347	40.152	205	19.54	166	5.7	3.042	48%	3.3%	29%
Deir Ezzor 3	Afforested	35.335	40.118	221	20.02	165	1.2	1.531	17.2%	53.4%	20.7%
Abbreviations used: Geographic location: Lat. = latitude (decimal degrees), Long. = longitude (decimal degrees) and Alt. = Altitude (m); Climatic conditions: MAT = mean annual temperature (°C) and Precip. = mean annual precipitation (mm).