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>00_107
SOUTH AFRICAN JOURNAL OF80TANY 1S5N"",..02t0
Forest edge herbaceous vegetation (Trifolio-Geranietea) of northern Spain J loldl. M H.r",,,,". I Garcla~ljangos and I Blurrun Department of Plant ~y and EooIogy (Botany). Ail. 644. University of [/le BB,,,,,,, Counlry. E·4808Oi 8iJrnoo. Spain • Corres{)O"ding author; e-ma#: rJl'phegarr>@ig.e~u,es
Roocerv&
[Ofm 10
Decembe< 2003
A sUNey of th. vegetation 01 forest (and hedge) Irlng••, classllled within th" Trlloflo-G.r.n>et..... In Ih" Bnqu" Country and th" w....tern and c"ntral Pyren...s (no"hern Spain) i. pr...nt.d. Th.... planl ossoclallons can be distinguished: the Centaureo nemorafls-Orlgan"lum vUlgarls,lhe Agrlmonio-Trllolietum medii lboth on iim.· rich subSlrat.s) and the Hype,ico androsoemlT.ucrielum scorodonlae (typical 01 siliceous soils). The
C.ntaureo .......o"'lis-Origanetum vUlgaris hIS already been ~nown from the Atlantic 10ne of Franc•. Th. Agrlmonlo.Trllofletum medII was d,""cribed lor C.nlral Europe and It was .150 lound to be widespread In the Pyr"n.es The Hyperico androsaeml-Teucrietum seorodoni.... is a new syntaxon (described in Ihis paper) and occurs In coastal r"'9lons 01 Ih" AlIanllc Basque Counlry (Ssntanderino-Vizcaino SUbseet",).
IntroduCllon Fores! fringe (soum) commun/lIes Belwoon nalural forests and ooighbooring grasslands. meadows Of _ types 01 vegetabon, lllere is a narrow fringe - a transitional habital (in tenns 01 light cond~"",s and nulJient status), in which forbs often dormnate and [Ofm s»ecial cornJOOmoo., Th,. medium-Gized, tatl. -Urticetea. In modern landscapes. secondary habitats are u.ually mora [requenl than P'imary one., espedally ,n region. where woodland. or lh'cketo have di""ppea'ed due to Inten".e farming actl.ity, Dislurbed edge' 01 scanered .hrut>bery in lhese cultural landscapes are a Iypi;· tats Into habitats lormerly occupied ~y anotl>er l>erbaceous vegetatIOn types has be"n call&bek 1993, P'IlnaW el al 1995. Mucma 1997. R..as-Martinez et a/. 2002a) !" comparison with the "itrophiioos forest-fringe communities oIl"" GalK>-Urticetea and lhe Cardamino hifSutae---Gt!ram"tea purpurei (hmlled 10 Sul)rned~"ITanean and M&
'pecIta· lion WOgical atfiances which .re particular to t _ regions, i.e. !he Origanion virentis and too Linafion IriOfnithophorae (including In total 16 association.) The charactenstic taxa of lhese alliances .re I"too in Rivas-Martlne:z el ai, (2002al,
.peae.
Di,frilwtion Al.ms This ""9"ta1lOO dass oltha TriloIio--Geranielaa has a """" di.1ribuIion in Europe ~ ~ " mostly found in lemperate Cent..... and We.tern Europe. in the zone croad-1eavOO forests, To tha north ~ reaches southern scandinavia and 10 !he south it is hmiled by too dry areas 01 the Modite"""""n reg"",. Tha Trifoiio--Geranietea communit... are ~nown lO be thermopllilous. hence the" stands wooId preler !he soolh-factng slopes and edges of forosts. This feature was formerly establi.hed out in oentml Europe. but ~ has ever been an ISSue of mL>cl\ discussion. It now _m, de...- that the... communit_ are r>ot Indicat;"e of warm climates in the soulhern part 01 lhe continent (Diefschke 1977). A' fa, as _ know. they are certainly mlS$lng in th$ cokIest areas.ch as high mountain. (and cryorotempe,ate thenrlypesl or in Itle Boreal Zone, as _ I as in the extreme sooth of the COIltinem ~ in the dry and semi..arid lt1ermomediterranean and me,omediter· ra""an "'!loon,. The Iberian Peninsula i, one of !he thr.... sooth$m p&nlnsulas 01 Europe, with a humid temperale north and a dry 10 semi-arid Mediterranean cenlre and south. characlerised b~ severe summer drought. Hence the plant oommunltie. of IhtI TriIoIio---Gerametea. known 10 be better adapted to temperele moist climates. have mainl~ northem di.1ribuIion in !he Iberian Peninsula and are usually a.socialtld with de6duou,
The aim 01 Ihis study is 10 describe the variabilit~ 01 the saum vegetalion in northen v.-ilolianl bw'll_ of !he mlIjo< di'nMic charae
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T&le (Table. 1-3). The dlstribut"", of the ......"" sites is shown in Figure 1 At; a further step 01 the anai)'sis. 00' d.ta Mve been subjected to compsnson with sImila, vegetaliO$ used 10 cons1ruct the synthet'o table,
gIom. cIIomo«lry•• Rot 2: E/ymIfl -.-..... ~ 1~ _ --... " ~ 1~
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1he Lethyro Iatilolii--Cel1leul1letum nemr1lIis (from thol os""rmum oIrlCinaifJ. The ar>ce of the laUe' species led lhe aut""", to call INs vegetalion un~ Trifolio medii---Li1hospermetum olficinalis, It is very III pulchr>-Owrcetum rol>oris) and Q. py"",aica (Malampyro praten,,;s--Ow,catum pyrenalcaa) as well as tho" mantal.hrub forma_ lions (Pruootalia .ploosae), From 1ha syntaxonomlc point 01 view, th.. community poses some dilfocult'" as to its posmon in 1ha current clas_ sificalion syslem (LOIdi er ai, 1997, Di'" and Fembndez Prleto 1994. Riva.-Martiooz at ai, 20(1). In 1979 Possarga descnbed Ih.. Melampyre>---Holcatalia (including the Malampyrion praten.is) f'" 1ha non-nitrophilous hert>aoeoerrr:> 11992)' lab 3 91. "" 1-11, Vi'Ia. (1993): tab. TXT. I rel. AfIrlmonk>---TrlIo!!owm _ primu,-ro.um colu"",": $. T_ 2 (in tl>ls _I, .. R"... -~arti""z III Ill. (1991): lab. J4. 3 _ .. sub Tnt_ n-.LiIhospom>oI,.." _ T, C..""", (199J): tab. 50. 3 roOs" Car""... 01 Ill, (1995): 100, Tx5, I rei" CarrtIo and NinoI (1992): tab. 61. 3 ,...... Can*' et al. (1_): lab 1, 20 _., Soriano (1992). lab. 3.91, 'eI. 1-11, ~ (1993); lab 36, 6 reIs .. l)'pjcu",: a. ~iJIo< (1916): lab. 126. ,01. l1a, .w
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References
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T_ TO. 110, • VII. Burv- HA. ' ...... OH. ~ $M, _ 00\ 1_) (1~'llIIO) F1In E_ _ I-V
Coo,*". u.w...ty " ' - . Coo,*"",-
....... _Ell_nIT, ......" I' ,01
_ npl'rjO- l · g y _ i b _ .. ~~.''"'.11 :IQ 111_11. VlPP9M I .... !'l (1J113) F""" i do loo ...........,... dol ao w.on, T~ _ . (OIod.). U_t>t do 9¥cOIIoDni, _ . ~ 'MoI)( 11Ul1JI Fioca i ~ do 1'..... Gorrncc. T " ' - . . ~ 010 Girona, Girono _ HE, """"-: J, T~ JP l2OOO1 1l'IIPinPIionoI Coolo 01 AI".. I ,cOl _ ... (3nl .o11lon) JDurnoI 01
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_ V ......... _E(I1113jn.
.......... IIlIM'.II.RH(edICl ...,Gdii_.of". ' GW ....... ThoHoo;o- llIIelll-nu s
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_ _ _ 01-'" 200 