Báo cáo " Sử dụng hệ thông tin địa lí (Gis) để xây dựng mô hình phân bố loài, lấy ví dụ loài Sao La (Pseudoryx nghetinhensis) ở Việt Nam" pptx

TAPCHi KHOAHOC VACONG NGHE '- Tgp 47, s6 2,2009 Tr. 29-37 SU' DUNG HE THONG TIN D\A LI (GIS) DE XAY Dl/NG MO HiNH PHAN B6 LOAI, LAY VI DU LOAI SAO LA (PSEUDORYX NGHETINHENSIS) 6" VIET NAM LS XUAN CANH, HA QUY QUYNH, IE MINH HANH, TRAN THANH TUNG 1. MODAU Viec du doan phan bo cua mot loai c6 y nghla v6 ciing quan trgng trong cong tac quan li va bao t6n cac loai dgng thuc vat trong thien nhien vi vay da c6 nhieu nha nghien ciru xay dy-ng cac loai mo hinh khac nhau de phuc vu muc dich nay. DiSm chung cua cac mo hinh phan Ijo loai la sir dung moi quan he giua nhung ylu to moi truong va thong tin ghi nhan dugc ve su ton tai ciia loai dS xac dinh cac dieu kien moi truang phii hgp vai sir phat trien cua loai do. Bai bao nay giai thieu phuang phap tiSp can mo hinh de phan tich sinh khi hau du doan viing phan bo ciia loai, doi tugng nghien ciru la loai Sao la a Viet Nam. Mo hinh phan bo loai dugc xay dung dua tren ca so li thuySt v^ sir thich nghi sinh thai. Cac di^u kien sinh thai thich hgp ciia loai dugc mo hinh hoa de du bao viing phan b6 cua loai tren ca so phuong phap, cong cu du bao dia sinh hgc. Sao la {Pseudoryx nghetinhensis) la loai thu mong gu6c, dugc phat hien vao nhtrng nam cuoi ciia thS ky XX, tai Vu Quang, Ha TTnh. Sao la dugc xgp vao bac cue ki nguy cap (CR) ciia lUCN va Viet Nam. Nhung nghien cuu ve sinh thai sinh hgc ciia Sao la hau nhu rat it do Sao la mai dugc phat hien va so lugng ca Xhk. Sao la con rit it trong tu nhien. 2. CO SO LI THUYET Cac buac chinh dk xay dung va danh gia mo hinh phan b6 cua mot loai cua Pearson (2007) dugc the hien trong hinh I. Co hai loai dir lieu diu vao can c6: (1) Cac thong tin ve phan bo loai; (2) Cac thong so moi truang. Cac thong so moi truang dang tho (vi du nhu thong so do im hang ngay thu tai tram khi tugng) se dugc xir li thanh du- lieu diu vao phii hgp voi mo hinh. Can phai kiem tra do chinh xac ciia dir lieu ngay tir buoc nay. Co sa de xay dung mo hinh phan b6 loai la vi tri cac di^m ghi nhan (quan sat) loai, tir do cung cip thong tin ve sinh canh song ciia loai. Cac ghi nhan ve loai va nhung thong s6 moi truong dugc dua vao cac ham so mo hinh de xac djnh nhirng diSu kien moi truang phii hgp vai su ton tai ciia loai. Da dam bao cac mo hinh cho ket qua toi uu, se c6 nhieu dap an va phep thir dugc dua ra. Mire do quan trgng ciia cac thong s6 moi truang dugc danh gia trong buac nay. Ban do du bao phan bo loai. Day la buac kiem tra kha nang du bao phan b6 ciia mo hinh. Nhung diem ghi nhan loai khong dugc su dung trong mo hinh se dugc su dung nhu nhung du lieu kiem tra doc lap. 29 Sau khi hoan thanh viec danh gia mo hinh, kit qua se dugc sir dung dk du doan sir ton tai cua loai tai nhtrng nai loai chua tirng dugc ghi nhan. Kiem tra ket qua ciia mo hinh ngoai thuc dja tai nhirng viing ma sir hien dien ciia loai dugc cho la han hiru hoac xac suat thap. : HT -^M ') ''' ' "cJ - •••4 3. SO LIEU VA PHAN MEM 3.1. So lieu Diem phan bo Sao la: cac diem ghi nhan c6 Sao La trong nhirng nghien ciru truac day (Nguyen Xuan Dang va cong su, 2007) dugc sir dung lam so lieu dau vao ciia mo hinh tinh toan. Cac lap so lieu sinh khi hau Viet Nam (nhiet do trung binh nam, chenh lech nhiet do theo miia, lugng mua trung binh nam ) dugc lay tir Atlat Viet Nam (Bg Khoa hgc va Cong nghe, 2005), cac tram quan trac ciia Viet Nam va tham khao nguon so lieu tai cac tram sinh khi hau the giai (http://www.worIdclim.org/bioclim.htm); sau do dugc quy chuan ve He tga do WGS 84, 6 so 48, so lieu dugc luu trtr a dang Grid ASCII. BIOCLIM. Ban do tham thuc vat rirng Viet Nam dugc xay dung tir anh ve tfnh Landsat ETM 2005 va tham khao tir nguon so lieu dieu tra rirng nam 2005 ciia Cue Kiem lam, Bg Nong nghiep va Phat trien nong thon. Ban ghi (vj loai, loai do cac diem nhan ve tri quan loai sat ke ca vj tri khong ton tai) con Co so dir lieu GIS: cac thong so moi truang (nhiet do, lugng mua, tho nhuang ) Xir 1 chon bao trong dinh loai ngay ngay i dir lieu ra bien so CO gia viec phan bo (Nhiet cao nhat, lanh ) 6k du tri xac ciia do so ^ ^ Ap dung cac thuat toan mo hinh (Maxent, tuyen tinh hinh hoc, dinh luat giai han ) —7">r- H Mo hinh cap do phan bo (lira chon thong so phii hgp, thir cac bien so dir doan khac nhau) Hinh I. Cac buoc chinh de xay dung va danh gia mo hinh phan bo ciia mot loai (Pearson 2007) Kiem tra kha nSng du doan (do chinh xac) ciia mo hinh bang viec kiem tra thuc dja hoac chia so lieu dau vao de kiem tra kha nang dir bao bang chi so ^ Ban do phan bo loai Du doan viing phan bo ciia loai a nhOng vLing dia li mai, (irng dung cho loai ngoai lai) hoac thai gian khac (sir thay doi cua khi hau) 30 Neu dieu kien cho phep, kiem tra ket qua ciia mo hinh ngoai thuc dia, 0 nhtrng noi ghi nhan khong lien tuc, nhirng viing di cu, hoSc viing phan bo khong lien tuc. 3.2. Phan mem - Phan mem ARC GIS phien ban 9.1 diing de chinh li, chuan hoa, chong ghep va phan tich thong tin. - Phan mem MaxEnt phien ban 3.2.1 dugc sir dung de xay dung mo hinh phan bo loai. (http://www.cs.princeton.edu/~schapire/maxent/) 4. KET QUA 4.1. Mo hinh dy bao vung phan bo cua Sao la. Nhan to dau vao ciia mo hinh gom cac lap sinh khi hau, trong do moi nhan to sinh khi hau dugc xep hang mire do quan trgng tir tat ca cac diem ghi nhan, tir do thiet lap bg so lieu phan hang (ki hieu KHC) mire do quan trgng ciia cac nhan to. KHC bien thien tir mire do thap nhat tai cao nhat (tuang irng tir 0,05 tai 0,95). Gia tri ciia cac nhan to khi hau a moi vj tri dugc dem so sanh vai KHC. Neu tai mot vi tri tat ca cac nhan to khi hau rai vao khoang KHC, vi tri do dugc cho la thuan Igi doi vai su ton tai ciia loai. Neu gia tri cua mot hay nhieu nhan to nam ngoai KHC (tir 0 - 5% hoac tir 95 - 100%) nhung van nam trong khoang dao dgng ciia day cac nhan to, vi tri do dugc cho la khong thuan Igi doi vai sir phan bo loai. Neu gia tri cua 1 hay nhieu nhan to nam ngoai khoang dao dgng vi tri do dugc cho la viing khong phan bo. Chu glal 6*1 gioi qu6c gia I ^ Knang phan tii 1^1 Dv Ooin vung ptitr D6 •i V^E -OCKpiiB 3* ao 180 no OOTrudnftS. V,-, ib^^^yf • Sit ^.** - «r- '^'^K"'' — >&:' Chu gia) BiSn gwi quit gta GiA (r! Ilch h9^ 0 HI 2 i V ' # % ^*-l^i^' ^^" 0 80 16C "="•'" N s -QO f^J*^ 5* -"i , ;.' , 320 ^0 In/O-ia&i ,-a , '- Hinh 2. Ban d6 du bao viing thich hgp cho su phan bo cua Sao La (a: Dir bao vting phan b6; b : Viing dir bao phan bo c6 rirng thuang xanh) 31 Sir dung MaxEnt de mo phong viing phan bo ciia Sao la a Mien Trung Viet Nam vai cac nhan to moi truang. Kha nang du doan ciia MaxEnt nam trong khoang tir 0 - 1. Hinh 2 la ban do mo phong viing phan bo ciia Sao la do mo hinh dua ra. Co tong so 16.074 pixel (chiem 4,92% trong tong 326.671 pixel) nam trong khoang c6 dieu kien sinh khi hau thich hgp vai sir phan bo cua Sao la, tuong ling vai dien tich 1.607.400 ha viing mau den (hinh 2a). Vting thich hgp cho su phan bo cua Sao La thugc 8 tinh: Thanh Hoa, Nghe An, Ha TTnh. Quang Binh, Quang Trj, Thira Thien Hue ,Da Nang va Quang Nam. Sao la la loai thu rat nhiit nhat, chi bat gap trong cac sinh canh rirng thuang xanh, nhtrng nai it c6 tac dgng cua con nguai (Nguyen Xuan Dang va cong su, 2007). Xay dung ma tran tuong tac giira mo hinh du doan viing phan bo Sao la va tham thuc vat riing thuang xanh thu dugc 4 kha nang khac nhau phu thuoc vao vi tri trong ma tran; Gia trj = 0 tuang irng vai nhQ-ng viing khong c6 tham thuc vat va viing khong phan bo. Gia trj = 1 tuang irng vai nhtrng viing c6 tham thuc vat va viing khong phan bo ciia mo hinh hoac khong c6 tham thuc vat nhung mo hinh du doan thich hgp cho su phan bo Sao la. Gia trj = 2 tuong irng vai nhtrng viing c6 tham thuc vat va viing thich hop cho sir phan bo Sao la. Bang 1. Ma tran tuang tac cac kha nang phan bo va lop phii thuc vat Du bao CO Khong CO Tham thuc vat 2 1 Khong CO tham thuc vat 1 0 Gia tri tuang tac 2 thoa man cac dieu kien: (1) la viing thich hgp cho su phan bo ciia Sao la do mo hinh phan bo dua ra, (2) la viing c6 riing thuang xanh bao phii; dieu kien nay thich hgp voi sir phan bo ciia Sao la va triing voi dieu kien sinh khi hau ciia cac diem ghi nhan Sao la (hinh 2b). 4.2. Ket qua dy bao viing phan bo va cong tac bao ton Sao la Ket qua du bao viing phan bo ciia Sao La the hien Bang 2. Ti le dien tich thich hgp cho Sao la a cac tinh Mien Trung TT 1 2 3 4 5 6 7 8 Tinh Thanh Hoa Nghe An Ha Tinh Quang Binh Quang Trj Thiia Thien Hue Da Nang Quang Nam Tong so Dien tich 1.108.082,51 1.647.902,16 830.875,53 793.982,94 474.233,05 493.436,02 96.885,53 1.059.188,22 6.504.585,96 Dien tich thich hop 8.371,81 212.261,58 76.987,90 252.937,20 82.989,14 155.761,36 27.901,38 229.366,60 1.046.576,97 Ti le % 0,76 12,88 9,27 31,86 17,50 31,57 28,80 21,65 32 - Viing thich hgp cho sir phan b6 cua Sao la thugc 8 tinh mien trung Viet Nam gom Thanh Hoa, Nghe An. Ha TTnh. Quang Binh. Quang Tri. Thira Thien HuL Quang Nam va Da Nlng. Dien tich thich hgp cho Sao la la 1.046.577 ha chi^m 16,09% dien tich tu nhien cua 8 tinh. 6/8 tinh CO dien tich tich hgp cho Sao la chiSm tren 70.000 ha g6m Quang Binh (252.937 ha), Quang Nam (229.366 ha), Nghe An (212.261 ha), Thira Thien Hue (155.761 ha) Quang Trj (82.989 ha^ va Ha TTnh (76.987 ha). Tinh Thanh Hoa va Da Ning c6 dien tich thich hop^cho Sao la nho (duai 30.000ha). - Hai tinh Quang Binh va Thira Thien Hue c6 ti le dien tich thich hgp cho Sao la cao nhit (> 31%). Hai tinh Quang Nam va Da Ning c6 ti le dien tich thich hgp cho Sao la cao (> 20%). Tinh Thanh Hoa c6 dien tich thich hgp cho Sao la nho (8.371 ha) chiem 0,76% dien tich tu nhien nam a khu vuc giap bien giai Viet Lao. Ba tinh Nghe An (12,88%), Ha TTnh (9,27%) va Quang Tri (17,5%) c6 ti le dien tich thich hgp nho vi dien tich tu nhien ciia tinh Ion (hinh 3). Hien trang bao ton Da dang sinh hgc noi chung, Sao la noi rieng tai Mien trung the hien: - Viing thich hgp cho Sao La nam trong 13 tren 15 khu bao ton thien nhien a Mi8n trung. CO dien tich 314.044 ha, chiSm 30% dien tich thich hgp. Co 10/15 khu bao ve (VQG va Khu Bao ton) CO ti le dien tich thich hgp cho su phan bo cua Sao la tren 30%. Cac khu bao ve c6 dien tich thich hgp Ian nhit gom: Phong Nha - Ke Bang (81.901 ha), Pii Mat (45.093 ha), Pii Huong (32.540 ha) va Vu Quang (29.346 ha); day ciing la bon khu bao ve dugc xac nhan c6 sir phan bo ciia Sao la. Ba khu bao ve gom Ben En, Khe Net va Ke Go khong thich hgp cho sir phan bo ciia Sao la, dieu nay phii hgp vai cac ket qua dieu tra da dang sinh hgc trong nhirng nam truoc day (bang 3). - Sir dung cong cu GIS va ket qua du bao tir mo hinh phan bo de thiet ke khu bao ton Sao la thugc tinh Quang Nam (tren ca sa cac tieu chi nhu: do Ian ciia Khu bao ton (27.129,19 ha); ti le dien tich phii hgp cho Sao la (75,35%) phii hgp vai ket qua dieu tra khao sat da dang sinh hgc truac day ciia Nguyen Xuan Dang va cong sir (2007) (hinh 4, hinh 5). - Viing CO dieu kien sinh khi hau thich hgp cho Sao la thugc khong gian thiet ke bao ton bao phii toan bg dien tich khu bao ve du kien (100%). Viing c6 dieu kien sinh khi hau thich hgp cho Sao la va c6 riing thuang xanh che phu thugc khong gian thiet ke bao ton rong 20.441 ha, chiem 75,35%. Thanh Hoa Nghe An Ha Tinh Quang Quang Tn Thi/a Oa Ning Quang Binh TTiien Hu^ Nam ••• Dien tich [=^ Dten tich thich hap cho Sao La 1116% Hinh 3. Bi^u d6 ti le dien tich thich hgp cho Sao la o cac tinh Mien trung 33 Bang 3. Ti le dien tich thich hgp cho Sao la a cac khu bao ve Mien Trung, 2008 TT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Khu bao ton Bac hai van Bac Huang Hoa Bach Ma Ben En Dak Rong Hai Van San Tra KeG6 Khe Net Phong Dien Phong Nha Ke Bang Pu Hoat Pii Huong Pii Mat Vu Quang Xuan Lien Tong so Viing du kien Dien tich ha 13.142,48 68.526,13 21.918,24 15.440,53 41.431,98 9.909,90 24.362,30 20.605,79 41.735,38 10.2767,41 68.788,64 46.962,89 96.500.85 57.391,73 22.897,71 652.381,96 27.129,19 Dien tich thich hop ha 3.699,15 24.135,40 12.638,95 0,00 22.486,96 2.538.48 0,00 0,00 28.831,54 81.901,20 27.048,90 32,540,60 45.093,00 29.346,90 3.783,13 314.044,21 20.441,60 Ti le % 28,15 35,22 57,66 0,00 54,27 25,62 0,00 0,00 69,08 79,70 39,32 69,29 46,73 51,13 16,52 48,14 75,35 100000 00 •- 80000 00 Bac Hai Bac Bach Bfen Em Dak Hai Ke G5 Khe Riong Riong Rj htoat Ri F\j Mat Vu Xuan Vung van Kr*ng ^B Rong van N6t Di6n h*a Ke hijing Quang bin */ to6n H6a Scm Bang Tra I ^m DiSn tich ha i 1 Di6n tich thich hop Ti 16 % I Hinh 4. Bieu do ti le di?n tich thich hgp cho Sao la a khu bao ve Mi6n Trung 34 • t^ 1 Chu giai 1 1 j Biftn gi6i QuAc gia . j ] Ranh gibi tinh QuSng Nam 1 . Ranh giCn vung du Kien b^ ton Kit qua cV bao phan b6 Sao la KhOng ph4n b6 ^^ Pt\Ar\ b6 • psedoru* hatmhensrs —1 1 1 N W-sfa|E • TinhThi/aThwnHui ' Tinti Ou^ng Nam 0 5 10 20 Kilometers Hinh 5. Ban do thiet ke khu bao ton va dien tich thich hgp cho Sao la, Quang Nam 5. KET LUAN Mo hinh phan bo Sao la a Viet Nam dugc xay dung vai so lieu dau vao la cac lap thong tin ve dieu kien sinh khi hau cua Viet Nam va diem ghi nhan Sao la trong cac nghien ciru truac day. Day la 2 nguon so lieu dau vao bat buoc de phan mem Maxent (Maximum Lntropy) xay dung mo hinh phan bo loai. Mo hinh phan bo dugc xay dung tren ca sa li thuyet ciia Pearson 2007. Viing thich hgp cho sir phan bo ciia Sao la thugc 8 tinh Miijn Trung tir Thanh Hoa toi Quang Nam. Dien tich thich hgp viing phan bo ciia Sao la chiem 16.09% dien tich tu nhien ciia 8 tinh. Hai tinh Quang Binh va Thira Thien Hue c6 ti le dien tich thich hgp cho Sao la cao tren 31%. Viing thich hgp cho Sao La nSm trong 13 khu bao ton thien nhien chiem 30% tong dien tich du bao. 10/15 khu bao ve c6 ti le dien tich thich hgp > 30%. Cac khu bao ve c6 dien tich thich hgp Ian nhat gom: Phong Nha, Ke Bang (81.901 ha), Pii Mat (45.093 ha), Vu Quang (29.346 ha) va Pii Huong (32.540 ha). Ba khu bao ve gom: Ben En. Khe Net va Ke Go khong thich hgp cho Sao la. Khu bao ve de xu3t nhSm bao ton nguyen vi Sao la tai tinh Quang Nam c6 dien tich 27.129ha, nSm hoan toan trong viing c6 dieu kien sinh khi hau thich hgp cho Sao la. Khu bao ton du kien c6 20.441 ha rirng chiem 75,35% dien tich. Viec sir dung mo hinh phan b6 loai tich hgp vai cac cong cu GIS, cac viing phan bo va du bao phan bo ciia Sao la dugc th^ hien mot each true quan, giiip cac nha quan li bao ton dua ra quy6t dinh phii hgp. Viec xay dung mot hanh lang bao ve noi lien cac Khu bao ve hien c6, dac bi^t la Khu bao ve dk xuat d^ bao ton loai Sao la khong chi ho trg tich cue cho loai bi de doa tuyet chung, ma con mang lai Igi ich bao ton cho nhieu loai dac hiru trong khu vuc mien Trung nhu Mang Ian Muntiacus vuquangensis, Mang Truang San Muntiacus triiongsonensis va Tho van Nesolagus timminsi. Mo hinh khong chi c6 y nghia doi vai du bao phan bo cua loai Sao la ma con la cong cu de du bao doi vai cac loai dgng vat khac, dac biet la viec du bao doi vai nhirng loai sinh vat ngoai lai. 35 Lai cam on. Nghien CLPU nay nhan 6\Jigc si/ tai trg cua De tai nghien cCru khoa hoc ca ban, Bo Khoa hoc va Cong nghe. Xin chan thanh cam an. TAI LIEU THAM KHAO 1. Alexandre. H. Hirzel and Raphael Arlettaz - Modeling habitat suitability for complex species distributions by environmental-distance geometric mean. Environmental management 32 (5) (2003) 614-623. 2. Ana M. F. Bio - Prediction of plant species distribution in lowland river valleys in Belgium: modelling species response to site conditions. Biodiversity and Conservation 11, 2002, pp. 2189-2216. 3. Dirk M et al - Species richness coincidence: conservation strategies based on predictive modelling. Biodiversity and Conservation 14, 2005, pp. 1345-1364. 4. Jin Li E, David W. Hilbert - A new habitat modelling technique for predicting the distribution of species' occurrences using presence-only data based on limiting factor theory, Biodivers Conserv DQI 10.1007/sl0531-007-9270-7, 2008. 5. Le Xuan Canh, Ha Quy Quynh, Le Minh Hanh va Tran Thanh Tiing - Sii' dung cong nghe he thong tin dia li de xay dung ban do phan bo Bo tot a mien Trung Viet Nam, Bao cao khoa hgc hoi nghi Sinh thai va Tai nguyen sinh vat Ian thir hai. NXB KHKT, Ha Noi. 2007, tr. 186-191. 6. Le Xuan Canh, Tran Thanh Tiing, Ha Quy Quynh, Le Minh Hanh - Xay dung phan mem giam sat dgng vat bang MS Access va GIS, Tap chi Khoa hgc va Cong nghe 44 (4) (2006) 101-108. 7. Le Xuan Canh, Nguyen Cu, Tran Thanh Tiing, Ha Quy Quynh, Le Minh Hanh - Sir dung cong nghe He thong tin dia li (GIS) de xay dung ban do phan bo Cong a Dak Lak,Tuyen tap cac cong trinh nghien cuu sinh thai hgc va tai nguyen sinh vat. NXB Nong nghiep. Ha Noi, 2001, tr. 35-138. 8. Atlat tu nhien Viet Nam, Nha xuat ban Ban do, 1996. 9. Nguyen Xuan Dang va cong su - Dieu tra nghien ciru hien trang, mot so dac diem sinh hgc, sinh thai, cac tac nhan lam suy thoai quan the Sao la {Pseudoryx nghetinhensis) va de xuat cac giai phap quan li bao ton, Bao cao ket qua thuc hien de tai KHCN cap Vien Khoa hgc va Cong nghe Viet Nam 2006 - 2007, Vien Sinh thai va Tai nguyen sinh vat, 2007. 10. Pearson R. G. - Species' distribution modeling for conservation educators and practitioners. Synthesis. American Museum of Natural History. Available at, 2007, http://ncep.amnh.org. 11. Pearson R. G., Dawson T. P., and Liu C. - Modelling species distributions in Britain: a hierachieal integration of climate and landcover data. _/ Ecography 27, 2004, 285-298. 12. Richard B. Primack, Bien dich va bien soan V6 Quy, Pham Binh Quyen, Hoang Van Thang - Ca Sa sinh hgc bao ton, NXB Khoa hgc va Ky thuat, Ha Noi, 1999. 13. Steven J. Phillips and Miroslav Dudi'k - Modeling of species distributions with Maxent: new extensions and a comprehensive evaluation, Ecography 31 (2008) 161-175. 2008. 36 SUMMARY APPLICATION GEOGRAPHIC INFORMATION SYSTEM (GIS) TO BUILD SPECIES DISTRIBUTION MODELING, CASE STUDY SAO LA PSEUDORYX NGHETINHENSIS FN VIETNAM Predicting species' distributions has become an important component of conservation planning and a wide variety of modeling techniques have been developed for this purpose. In this article, GIS software and modeling software called MaxEnt version 3.2.1 are used to develop the distribution modeling of Sao La {Pseudoryx nghetinhensis) in Vietnam. The input data is records of Sao La in previous studies and GIS layers. Appropriate areas for the development of Sao la species locate in 8 provinces in the Central Vietnam, from Thanh Hoa to Quang Nam which occupy 16.09% the total area of these provinces. 30%) of the appropriate areas are Protected Areas (13 PA) in which Phong Nha - Ke Bang (81901 ha), Pu Mat (45093 ha), Pu Huong (32540 ha) and Vu Quang (29346 ha) are among the large ones. Ben En, Khe Net and Ke Go are not appropriate for Sao la development. Using modeling and GIS technology, the species distribution and predicted species distribution is displayed clearly. The development of a corridor connecting Protected Areas in the region, especially the creation of proposed Protected Areas for Sao la will benefit not only these species, but also the suite of associated endemic species found in the region. This distribution modeling is not only a technique to predict the distribution area of Sao la but also to be a application technical to predict for other mammal species, especially predicting the area of invasive species. Dia chi: Vien Sinh thai va Tai nguyen sinh vat, Vien Khoa hgc va Cong nghe Viet Nam Nhan bdi ngdy 12 thang 6 nam 2008 37 . nhan Sao la (hinh 2b). 4.2. Ket qua dy bao viing phan bo va cong tac bao ton Sao la Ket qua du bao viing phan bo ciia Sao La the hien Bang 2. Ti le dien tich thich hgp cho Sao la a cac tinh. distribution modeling of Sao La {Pseudoryx nghetinhensis) in Vietnam. The input data is records of Sao La in previous studies and GIS layers. Appropriate areas for the development of Sao la species locate. 47, s6 2,2009 Tr. 29-37 SU' DUNG HE THONG TIN DA LI (GIS) DE XAY Dl/NG MO HiNH PHAN B6 LOAI, LAY VI DU LOAI SAO LA (PSEUDORYX NGHETINHENSIS) 6" VIET NAM LS XUAN CANH, HA