II. ANH HU'ONG CUA DU' LU'9'NG PHAN BON HOA H9C V6 CO'
HSTDNN DONG BANG CHAU THO
8.2. cac vung ~inh thai c:fa"t li~
1. Vung lay mJ(1c ngqt
c. CO' c~u cua HST:
- TV chi th! thay d6i theo tung vung chu yeu Ia TV n6i, sinh khoi dLFqc tao ra tli dU'&i m~\1 dat.
- sv tieu th1,1
·sv phan giiii Ia cac sv nhci nhU' giun tron
'ElV kh6ng XU'O'ng song Ia nhOng ElV biet bay nhU' ruoi, muoi ' c6n !rung ... Ia nguon th(fc an cho ca, ech, chim ...
'ElV c6 vu chu yeu Ia chu(it xa. sinh san rat nhanh
'Chim Ia cac loai chim biet l~n nhU' vjt, ngong, thien nga ... an
c6 hoac an tap
'Ca rat da dang va phong phu v&i nhieu chung ~oai
8.2. Cac vung sinh thai ~«t li~ 1. Vung lay nlf(1c ngqt 1. Vung lay nlf(1c ngqt
d. Chu'C nang cua HST:
• Nang suat SO' cap phu thu6c vao he gen bllm sinh giOa cac
loai
Sl! phan huy ph1,1 thu9c vao chat IU'qng va kha nang chang lai Sl,l' phan huy cua cay, nhi~t dq, chat dinh dU'&ng va che d(i ngijip cua vung hliy.
T6n that lu·qng hOu CO' rat nhii dlv vung lay nu&c ngqttrQng oon d/v vung lay ven ho Ia dang ke.
Dong nang IU'qng co phan 16n nang suat nguyen b! mat qua h6 hap cua SV lieu !h1,1
8.2. Cac vung sinh thai d«t llat
2. Vung lay than bun
a. T6ng quan: chu y~u phan b6 & cac vung l<;~nh c6 d() am cao, chu ~l
Ia vung lay axil. nnh axil Ia do c6 trao dOi cation v&i r~u. oxi h6a cac
hqp chatS, cac axil hCl'u ca. NAng suat sa cap thap do dinh du·O>ng thap, phan hlly ch~m. lich lOy than bun cMm
D~m lAy loan Sphagnum t:,li Hlnh 3nh r:hvp h) trAA f'.ao ("jja r.Ac ttAm
lAylhan bUn tinh . _. - ~ . :; ... - .... .. .~~~ --· - -- ~~ ~ ' . - ~. . ...•. - - -
8.2. cac vung ~inh thai a~t U'~
2. Vung fAy than bun
b. £!ia ch~t thl.ly v~n: S~,r phat trh~n thong qua 2 qua trinh chinh: Can b<ilng nU'oc
Tich Illy than bun
C6 3 each hinh thanh thU'ong g~p:
• Ho c~n: qua trinh lap day cac ho c~n. be m~t th~,rc v~t nooirbij (adsbygoogle = window.adsbygoogle || []).push({});
tach khoi Sl!' cung cap dinh dU'&ng.
·Than h6a dam Jay: xay ra khi vung Jay che phu vU'ql qua ranh gioi Jan Chiem vung dat kho
• Tien tri~n theo dong chay: hinh thimh dong chay qua nhfrng
vung J§y noi tiep dong chay ngam va be m~t
a.2. Cac vung sinh thai 4<1"t U'{lt 2. Vung l~y than bun 2. Vung l~y than bun
c. CO' c~u cua HST:
TV dU'ac phan thanh 7 vung chinh.
Rung ~m giau
• Rung ~m ngheo
Dam Jay cay HU'ong trang va Hon giao
Dam lay thong n,mg Ia va vCing lay
Rung XU'ong rong d€m - cay Ia kep long chim Rung lay cay thuqc da - XU'ong rong den Hon giao
DV: DV c6 vu. Dv IU'&ng CU', Chim, Dv khong XU'ong song
8.2. Cac vung sinh thai 11<1"t lf{lt 3. Bai J~y mr(1c sAu 3. Bai J~y mr(1c sAu
a. T6ng quan: Ia h~ mt&c ngot trnh t6n tai phlln lon hoac su6t ca nam.
TV di;\c trung Ia cay bach.
Nang su.1t SO' cap bj gioi han boi cac di~u ki~n thuy van.
~- _ Ia m(it lo~i cay aam
liiy cO dien hinh a khu Vl!C nU'&c sau o chauAu
8.2. cac vung ~inh thai 4~t U'~