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Scarica il numero in pdf - Biblioteca digitale - Provincia di Cremona

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38<br />

progr. cenosi XXIX XXIX XXIX XXIX XXXI XXXI XXXI XXXI XXX XXX XXX XXX<br />

sigla S_c<strong>in</strong> S_c<strong>in</strong> S_c<strong>in</strong> S_c<strong>in</strong> S_alb S_alb S_alb S_alb a_Aln a_Aln a_Aln a_Aln<br />

num. progr. 50* 55* 59* 64* 45* 66* 67* 87* 52* 58* 65* 56*<br />

data 4-6 4-6 4-6 4-6 4-6 4-6 4-6 8-7 4-6 4-6 4-6 4-6<br />

sup. (m2) 9 9 9 9 25 9 9 25 9 9 9 9<br />

n° spp. 6 8 8 12 8 6 8 9 10 7 11 8<br />

Cornus sangu<strong>in</strong>ea (B) . + 1 . . . . . . . . .<br />

Cornus sangu<strong>in</strong>ea (E) . . . . . . . . . . + .<br />

Sambucus nigra (B) . . . . . . . . 3 2 2 5<br />

Sambucus nigra (E) . . . . . . . . . . 1 1<br />

Phragmiti-Magnocaricetea<br />

Typhoides arund<strong>in</strong>acea + . . + . . + . 1 . . .<br />

Carex acutiformis . 1 2 2 . . . . . . . .<br />

Lysimachia vulgaris . . + + . . . . . . . .<br />

Phragmites australis . . . 1 . . . . . . . .<br />

Compagne<br />

Phytolacca americana . . . . . . . . + . + .<br />

Potent<strong>il</strong>la reptans . . . . . . . . . . . .<br />

Vicia sativa . . . . . . . . + . . .<br />

Poa trivialis . . . . . . . . . . . .<br />

Bromus ster<strong>il</strong>is . . . . . . . . . . . .<br />

“Specie spora<strong>di</strong>che: r<strong>il</strong>. 50 (Cardam<strong>in</strong>e hirsuta +); r<strong>il</strong>. 87 (Cirsium arvense +); r<strong>il</strong>. 52 (Galeopsis tetrahit +); r<strong>il</strong>. 72 (Agropyron<br />

repens +); r<strong>il</strong>. 47 (Fallopia convolvulus +; Lactuca serriola +; Oxalis fontana +); r<strong>il</strong>. 17 (Stellaria me<strong>di</strong>a 3; Lamium purpureum<br />

+; Oxalis fontana +; S<strong>il</strong>ene alba +; Symphytum offic<strong>in</strong>ale +); r<strong>il</strong>. 46 (Anagallis arvensis +); r<strong>il</strong>. 27 (Convolvulus arvensis +); r<strong>il</strong>. 34<br />

Tab. 6: r<strong>il</strong>ievi relativi alle cenosi arboreo-arbustive (*<strong>in</strong><strong>di</strong>ca che <strong>il</strong> r<strong>il</strong>ievo è stato eseguito nella riserva).<br />

<strong>in</strong><strong>di</strong>ce ecologico<br />

F<br />

R<br />

N<br />

L<br />

T<br />

K<br />

DCA1 DCA2<br />

+0.47* -0.61*<br />

ns ns<br />

-0.23* -0.39*<br />

+0.34* +0.54*<br />

ns +0.24*<br />

-0.20* +0.36*<br />

Tab. 7: coefficienti <strong>di</strong> correlazione l<strong>in</strong>eare tra gli<br />

score della DCA e i valori degli <strong>in</strong><strong>di</strong>ci ecologici per<br />

ciascun r<strong>il</strong>ievo (ns: non significativo; * p

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