á NERC Copy right 2002 Printed in 2002 b• • Ashford Overload ISBN 1 870393 64 3 The Centre for Ecology an d Hydrology (CEID is o ne of the Cemres and Surveys of the Natural Environment Research Council (NERO . Established in 1994; CEH is a 1mila-disciplinary, em ironmemal research organisation with som e 6 00 staff an d Well-eq uipped laboratories and field facilities at ten sites throughout the United Kingdom , CEITs mission is to "advan ce the science of ecology, environmental microbiology and hydrology through high quality and inte rn ation ally recognised research lead ing to be tter unde rstan ding and quantification of the physical, che m ical and biological processes relating to land and freshw ater an d thi ng organisms within these environments' . CEFI provides indep en dent research to inform government p olicy on natu ral resource manage ment an d environ me ntal protection and to raise p ublic awareness of envaonmental issues. Major develop ments in commissione d research funded by Govennn ent have taken p lace in several areas o f p ublic concern such as flood risk estim ation and floo d forecasting , risk assessment of genetically modified crop s, the ecological effects of end ocrine disruptors, and the eco logical impacts and clrivers of land use cha nge. CEITs research is finance d by the l aC Government through the science budget, and by pdvate and public sector customers who commission or sponsor specific research programmes CEH's exp ertise is also widely used by interna tional organ isations in overseas collaborative projects. The results of CEH research are available to those responsible For the protection. managemen t and wise use of our natural resources, being publiShed in a w ide range of scientific journals a nd othe r publications . The 'CEH Annual Report conta ins more gen eral information . For furthe r information, visit s±,_ww.ceha emk . The Biolog ical Records Centre is oper ited by Ca l, as part of the Environmental Information Centre based at CEH Moriks Wood. BRC is jointly f unded by Ca l and the j oint Nature Consen .ation Comm ittee (www Mee gm tik) the latter acting on be half of the statutory nature con ser vation agen cies in England , Scotland, Wales and Northern Ireland . CEFI and JNCC sup port BRC as an imp ortant component of the de s-eloping National Biodiversity Network . BRC seeks to help na turalists and research biologists to co-ordinate their efforts in studying the occ urrence of plan ts and an imals in Britain an d Ireland, and to make the results of the se studies available TO otheis. Pu blished by Biological Records Cellar CEH Ma nia Wood A bbots Rip on H u ntingdo n Ca m bs PE28 21.5 Tel: 0148 7 772400 Pax 0 148 7 7734 6 7 www . / c ctc. tik Cover illustration : Araneus diaderna t itchy Mid el Roberts Lk. (4 1 0) -1_00 1 Centre for Ecology & Hydrology N ATU RAL ENV I RO NM EN T RESEARCH CO U N C IL P r o vis io n a l A tla s of Br itis h sp id er s (A r a ch n id a, A r a n ea e) , Vo lu m e 2 Co mp ile d a nd ed ited by Peter R.Ha r vey, Da vid R.Na s t & Ma rk G. Tef er D es k -top p ublis hing by P eter R. H a r vey To Cliff or d Sm ith , w ith out w h om th e Sp ider Recor din g Sch em e an d th is Pr ovis io n al Atlas w ould n ot h ave r each ed fr uitio n . JOINT NAT URE CONSERVATION COMMITTEE Cita tio n in fo r m a tio n Ha rve y, P.R., Nel list, D.R. & Telfer, M.G. (eds) 2002. Pro visional atlas of Br itish sp iders (Arachnida, Ara neae) , Volu m es 1 & 2. Huntingdo n : Biolog ical Record s Centre . CON TEN TS OF VOL UM E 2 KEY TO MAPS AND BAR CHARTS 215 SPECIES ACCOUNTS AND MAPS: TETRAGNATHIDAE TO SALTICI DAE 215 REFERENCES 389 SPECIES INDEX 397 á • SPE CIE SACCOUN TS AND MAPS. Tetrag nat h id ae to Sa itic ida e [ 1000 11 Tetr agn a t h idae : Tetragnat ha ex tensa KEY TO MA PS AND BA R CHA RTS Bo . o f 10 ' oc c ur r e nc e s For most species, the numbers of males and females recorded 0 19 0 0 0 1 95 0 each month are shown by bar charts with male and female data / 19 0 0 differentiated according to the following key: x o r e 0 Males • Females • ••4. • •« .• • n e r r Paser Maps A distribut ion map has been provided for each species, ,:ace show ing the British distribution by 10-km squares of the national grid. The following mapping symbols have been used throughout to show up any changes in distribution patterns J.< s over time. 8• te: pre-1900 + 1900 —1949 o 1950 —1979 • 0 0 0 0 • 0 O. • 1980 onwards • ••• • • 250 200 150 100 50 0 TI JFMAM JJYASOND St at us Common. Dist r ib ut io n The species is widespread throughout most of Britain. It is widespread in western and central Europe. Habitat and e co logy This spider spins its orb webs on grasses and other low vegetation especially in waterside and wetland habitats, both lowland and upland. As with other members of this genus, when disturbed the spider leaves its web and stretches out along a leaf with the four anterior legs po inting forwards and the four posterior legs pointing backwards. Its elongate shape, combined with this pose, enables the spider to escape detection by predators. Both sexes are mature from early to mid-summer and sometimes into the autu mn. Aut hor of pr ofile: P. Lee 2 15 [ 1000 5] Te t ragnat hidae : Tet ragnath a p inicola [ 1000 2] Tet ragnat hida e : Tet rag natha m ont ane No . of 10k8' occ urr ences No . of 10 ' occurrences . 1980 onwards 107 • 1980 onwards 829 0 1950 - 1979 12 0 1950 - 1979 57 . 1900 - 1949 . 1900 - 1949 • )(pr e 1900 2 % pre 1900 3 " on • . UI * •• • _Os . • • 2 • • 1. : . r . • cc ecc • cc ii.- ant i: a • ** ***24 :: 82222•22 *2 ° ***2•24 22•2222"**** • _ ie._ .• cc agrt y . ;Ft : fr..:if • ar :::r . • e. :r . r • . ••. .• • ..• • • .. .. ...• • .. • o e 50 500 40 400 30 300 20 200 10 100 lir-ar— r — J F M A M J JY A S O N D J F M A J JY A S O N D Sta tus Nationally Scarce (Notable B). The spider is numerous at some St a t us sites, but very local. Com mon. Distr ibu tio n Many old records are doubtful because of confusion with Dist ribut io n T extensa.The species appears to be mainly southern and is The species is widespread in southern Britain, becoming widespread in southern England. It is widespread in north-western scattered in the north. It is widespread in western and central and central Europe . Europe as far north as southern Nor way. Hab itat and ecology T pinicola is usually found in lightly wooded areas, mainly on Habitat a nd e co log y young tr ees and tall open herbage in woodland clearings and rides . Orb webs of this species are found on trees, bushes and low In Essex it is often found in clearings several years after coppicing vegetation in a variety of habitats, mostly at low altitudes. It has taken place. Adults of both sexes are found in early to mid- may be found close to water but is less closely associated with sunun er, occasionally into August. wetland habitats than T extensa. Both sexes are mature from early to mid-summer and sometimes into the autumn. Th rea ts The loss of semi-natural mixed woodland to intensive forestry. Aut hor of profi le : P. Lee Man ag em e nt Retain areas of mixed-age broad-leaved woodland. Maintain traditional coppice rotation and ensure that woodland contains a patchwork of open areas and wide rides with plenty of woodland edge habitat. Author of profil e: P.R. Harvey, with reference to Merrett ( 1990). 2 16 [ 10004] Tet r agn at hidae: Tet rag nath a obt use [ 10003] Tet rag nat h ida e : Tetrag na t ha nigrit a No . o f 101m . occu r ren c es No . o f 10 1m . occu rr e nc es • 19 80 on w ard s 19 9 • 19 80 o rm a rd s 92 0 19 50 - 1979 32 0 19 50 - 19 79 7 + 19 00 - 194 9 9 + 19 00 - 19 49 3 x p re 19 00 1 s o re 19 00 0 W • 0 r • • .. • ••.. .. • • • • • 0 0 .1 . .1 0•• • : • 9' • 80 40 60 30 40 - 20 20 10 0 0 F M A M J JY A S O N D J F M A M J JY A S O N D St a t u s St a t us Locally common in England and Wales. Rare in Scotland and Generally an uncommon species in southern counties of Northern Ireland. England becoming rare in the Midlands and further north.