biological diversity and tropical forests in tunisia - PART
biological diversity and tropical forests in tunisia - PART
biological diversity and tropical forests in tunisia - PART
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species appear<strong>in</strong>g at this stage <strong>in</strong>clude:<br />
Echium plantagsneum Campanula dichotoma<br />
Paronychka echknata Calycotome villosa<br />
Sklene gallica Rubsa peregrkna<br />
Cichoiam <strong>in</strong>tybus Polypodkum vulgare<br />
Allium roseum Trklax apula<br />
A. pallens Ammi: majus<br />
Frequent disruptions to the ecosystems set back the successfonal<br />
stages <strong>and</strong> <strong>in</strong>sularity <strong>and</strong> other <strong>in</strong>fluences prevent establishment of the<br />
Quercus ilex climax forest. More xerothermkc locatfons are occupked by<br />
-<br />
Olea europaea - Pistacia lentiscus (or 0lea-lentiscus) formations.<br />
europaea has survived only 3x1 the most xerothermsc sites (c.30 ha), so<br />
most stacds are dom<strong>in</strong>ated only by Pistacia lentkscus (more than 140 ha).<br />
Olea-lentiscus formations occupy a belt 50 - 350 m wide between the lowest<br />
lkmit of the Quercus ilex type formatkons <strong>and</strong> the halophile zone along the<br />
sea. Spacias associated with the formation <strong>in</strong>clude:<br />
Galactilis tomentosa Euphorbia peplis<br />
Hyosaris radiata Jun2perus Phoenicia<br />
T Brassica cratica atlantica Ruta chalepensis<br />
Avia tenorii Rapistrum rugosum<br />
Carex divisa Brisa maxfma<br />
Capparis sp<strong>in</strong>osa Dactlyh glomerata<br />
Prasium majus Medscago hispida<br />
Alocg tha shora of Zembra <strong>and</strong> over most of Zembretta is a littoral<br />
zoce subjected to sea water spray, which favors halophile vegetation.<br />
This zone is 50 - 100 m wide on Zembra <strong>and</strong> extends up to 50 m kn altitude,<br />
cover<strong>in</strong>g a total of 80 ha. The halophile vegetation is typkfied by:<br />
acd accompaciad by<br />
Crithmum maritimum<br />
Inula crithmoidas<br />
Se~ecio crassifolius<br />
r Senecio c<strong>in</strong>eraria typicus<br />
Urg<strong>in</strong>ea maritima<br />
r Erodium maritkmwn<br />
Cakile aegyptia T<br />
Polygonum maritimum rT<br />
Polypogon maritimus<br />
Iberis semperf lorus<br />
The rema<strong>in</strong>der of Zembretta, around the<br />
Pistacia lectiscus<br />
Olea europaea<br />
r = Rare<br />
T = Tunisia E~demic<br />
Statice vsrgata<br />
S. echioides<br />
Lotus allkonii<br />
Fumaria capreclata<br />
Mesembryanthemem crkstall<strong>in</strong>um<br />
Atriplex patula<br />
Scabs osa far<strong>in</strong>osa<br />
Dkanthus rupicole hermaensfs<br />
Brassica cretkca atlantica<br />
Erodfum chium<br />
lighthouse is occupied by<br />
Phkllyrea angustffolfa<br />
Chamaerops humilis