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“PUSZCZA SŁUPECKA” NATURE RESERVE NEAR AS AN EXAMPLE OF A YOUNG FOREST ABUNDANT IN ANCIENTFOREST SPECIES

I D, P Z, Ł K

I. Dembicz, Department of Plant Ecology and Environmental Conservation, University of Warsaw, Al. Ujazdowskie , - Warszawa, , e-mail: [email protected] P. Zaniewski, Department of Molecular Plant Physiology, University of Warsaw, ul. Miecznikowa , - Warszawa, Poland, e-mail: [email protected] Ł. Kozub, Department of Plant Ecology and Environmental Conservation, University of Warsaw, Al. Ujazdowskie , - Warszawa, Poland, e-mail: [email protected]

(Received: January , . Accepted: May , )

ABSTR ACT. According to the “old forest indicator species” concept, the presence of many old forest indica- tor species suggests long ecological continuity of a patch of the forest. During the survey of the vascular fl ora of the “Puszcza Słupecka” Nature Reserve (Kotlina Warszawska Mesoregion, central Poland) vascular plant species were recorded, including species, which are indicators of ancient woodlands. Despite the fact that the area of the current “Puszcza Słupecka” Nature Reserve years ago was covered by grasslands and ponds, the number of these species nowadays are similar to the number encountered in forests of a comparable size with preserved forest continuity. A few hypotheses may explain this phe- nomenon. Firstly, the reserve area could have had mid-fi eld groups of trees, which had been refugees for undergrowth plants and which have become centers of expansion of these species in recent decades. Secondly, an important role could have been played by well-preserved oak-hornbeam and riparian forests in the neighbourhood and presence of a watercourse in the reserve.

KEY WORDS: vascular plants, forest fl ora, Puszcza Słupecka, indicators of ancient woodlands, old forest indicator species, forest continuity, nature reserve

INTRODUCTION The aim of the presented paper is to discuss, on a ba- sis of the fl oristic inventory of a nature reserve, whether Due to the severe deforestation and introduction a forest without long forest continuity can host many of of modern forestry European broad-leaved forest be- the “old forest indicator species”. came a rare habitat, which needs protection (S , C D... , Z ). There is an urgent need to protect the best preserved forest OBJECT OF RESEARCH communities, however some diffi culties in the correct identifi cation of considered patches appeared. In order “Puszcza Słupecka” Nature Reserve was established to facilitate the assessment of the conservation status of by the decree of Minister of Environmental Protection, particular forest patches, the “old forest indicator spe- Natural Resources and Forestry on December, cies concept” was introduced. The evaluation of quality (MP, , No. , pos. ) in order to protect forest com- of forest patches using vascular plants was presented by munities. It occupies an area of . ha. It is located P () and developed as a list of indica- in the Kotlina Warszawska mesoregion (K tor species by H et . (). In Poland, the list ) in a relatively small forest complex of approxi- of species was published by D and L mately km situated in the northwest of the Marki (). According to the mentioned authors, the species town in the Nieporęt municipality, county. meeting the criteria for “old forest indicator” must be It is located within the ED square of the ATPOL car- strongly associated with the forest environment, exhibit togram (Z ). low dispersal properties and weak ability to reproduce From the northwest the reserve borders with part- generatively. Such species tend to survive only in well ly managed and partly abandoned, overgrowing wet preserved forest patches with a long ecological conti- meadows (Fig. A). From the southeast it borders with nuity. It is still not clear to what extent “old forest wastelands of the Czarna Struga village, from the south indicator species” really indicate long forest continuity with allotments, while in other places its boundaries (R et . ). are in contact with the forests of Drewnica Division I. Dembicz, P. Zaniewski, Ł. Kozub

F. . Land use of the reserve and its nearest vicinity: A – present state, B – approx. years ago of the State Forests. A large part of the reserve edge is a large area of the valley (about ha) was fl ooded up to marked with the voivodeship road No. . An area of a depth of about .-. m. The water outfl ow from the . ha of young planted forest present within the reserve reserve is furthermore impeded by the embankment of is excluded from protection. At northern edge of the the road Słupno-Stanisławów. reserve runs on the embankment of a pre-war narrow The past of the reserve has been very important for gauge railway which was used to transport peat exca- the development of its fl ora. Before World War II the vated in the past about km north of the reserve. In the area was almost entirely accounted for wet meadows vicinity of the reserve, the “Łęgi Czarnej Strugi” nature and fi sh ponds (Fig. B). At that time within the area of reserve, established in to protect oak-hornbeam today’s reserve only solitary trees occurred or in small and elm-ash carr forests, is situated. One of its corners is groups. The only piece of the forest (of about ha) was located about m from the south corner of the “Pusz- present on the northwest edge of the modern reserve cza Słupecka” reserve. area. Uniform forest areas began in a short distance The reserve area consists of the Czarna river valley to the east and south from the modern borders of the and the dunes adjacent to the valley from the south- “Puszcza Słupecka” reserve (M ... ). east. The elevation diff erence between the bottom of the Nowadays the vegetation of the reserve is dominated valley and the tops of the dunes is about . m. A large by forest communities. A signifi cant area of the valley of part of the reserve is located within the Czarna river the Czarna river is occupied by Tilio-Carpinetum, Fra- fl oodplain. This watercourse was straightened many xino-Alnetum and Ribeso nigri-Alnetum. There are also years ago (M ... ) but its riverbed is patches of vegetation that can be associated with the embankment exclusively outside the reserve. Within regenerating Ficario-Ulmetum. The dunes are mainly the reserve water can easily fl ood the area up to the covered with coniferous forest communities such as edge of the dunes. For example in the summer of Querco-Pinetum and Peucedano-Pinetum but there are “Puszcza Słupecka” Nature Reserve near Warsaw as an example of a young forest abundant in ancient-forest species also patches of Tilio-Carpinetum. Tree stands of the re- – species recorded only outside the forest, in the mead- serve originate partly from natural succession and partly ow within the reserve: M; from planting (pine, oak and additionally geographically – species recorded only on the forest edges, roadsides alien spruce). Signs of coppicing are visible on some of or borders of the reserve: E. the alders growing in wetlands. Fallen trees, some cut by beavers, and dead wood are abundant in the reserve. Equisetopsida Near the riverbed still single specimens of the willow Equisetum pratense, E. sylvaticum (OF). Salix fragilis are still present, which probably originated Polypodiopsida from the times when the reserve was occupied mainly Athyrium fi lix-femina (OF), Dryopteris carthusiana (OF), by meadows. The small area of a meadow of about . D. fi lix-mas (OF), Polypodium vulgare (S), Pteridium aqu- ha is still present within the reserve. It is dominated ilinum (OF). by Deschampsia caespitosa and sedges (mainly Carex Pinopsida acuta and C. acutiformis). The meadow is also heavily Picea abies, Pinus sylvestris, Taxus baccata (S). penetrated by the wild boar and roe deer. During the Magnoliopsida survey moose has also been observed there. Acer negundo (A), A. platanoides, A. pseudoplatanus, The fl ora of the “Puszcza Słupecka” nature reserve Achillea millefolium, A. salicifolia (M), Acinos arvensis has not been the topic of a separate publication yet, and (E), Adoxa moschatellina (OF), Aegopodium podagraria the degree of knowledge about it was insuffi cient. Some (OF), Agrimonia eupatoria (E), Ajuga reptans (OF), Allia- data on the natural values of the reserve can be found on ria petiolata, Alnus glutinosa, Anemone nemorosa (OF), the Internet (e.g. P P S). A. ranunculoides (OF), Angelica sylvestris, Anthriscus sylvestris, Arctium lappa (E), Artemisia absinthium (E), A. campestris (E), A. vulgaris (E), Asarum europaeum MATERIALS AND METHODS (P, OF), Berteroa incana (E), Betula pendula, B. pubescens, Bidens frondosa (A), Calluna vulgaris, Caltha palustris, Survey on the fl ora of vascular plants was carried out Calystegia sepium, Campanula rotundifolia, Capsella during the spring and summer of and spring of . bursa-pastoris (E), Cardamine amara, C. pratensis (M), The study was conducted with topographic method (F- Cardaminopsis arenosa (E), Carpinus betulus, Cerastium ). It included the entire area of the reserve holosteoides, Chaerophyllum aromaticum, Chamaecyti- evenly and all habitat types occurring within it. Data on sus ratisbonensis, Chamomilla suaveolens (A, E), Chelido- the occurrence of the species were collected from fl oristic nium majus, Chenopodium album (E), Ch. polyspermum inventories. The names of vascular plant species and their (E), Chrysosplenium alternifolium (OF), Circaea interme- status as anthropophytes follow M et . (). dia (OF), Cirsium arvense (M), Convolvulus arvensis (E), Conyza canadensis (A, E), Corydalis solida (OF), Corylus avellana, Crataegus rhypidophylla, Cuscuta europaea (E), RESULTS Cytisus nigricans, Daphne mezereum (S, OF), Dianthus deltoides (M), Echinocystis lobata (A), Epilobium ade- The fl ora of the vascular plants of the reserve con- nocaulon (A, M), E. montanum (OF), E. palustre (M), sists of species, including dicotyledons, Erigeron annuus (A, E), Erophila verna (E), Erysimum monocotyledons, three gymnosperms and seven pteri- cheiranthoides (E), Euonymus europaea, E. verrucosa, dophytes. There are protected species, fi ve of which Eupatorium cannabinum, Euphorbia esula (E), Fallopia are strictly protected and seven are under partial pro- convolvulus (E), Ficaria verna (OF), Filipendula ulmaria, tection (R... ). One species is listed Fragaria vesca, Frangula alnus (P), Fraxinus excelsior, on the Polish “red list” of vascular plants (Z and Galeobdolon luteum (OF), Galeopsis bifi da, G. speciosa, S ). Within the reserve borders species G. tetrahit, Galinsoga ciliata (A, E), G. parvifl ora (A, E), alien to the Polish fl ora were found (Z et . , Galium aparine, G. boreale, G. mollugo, G. schultesi (OF), R ). of the recorded species are con- G. uliginosum, Genista tinctoria, Geranium robertianum, sidered as indicators of old forests (D and L- Geum rivale, G. urbanum (OF), Glechoma hederacea, Gna- ) phalium sylvaticum (E), Hedera helix (P, OF), Helichry- sum arenarium (P, E), Heracleum sphondylium, Herniaria List of species glabra (E), Hieracium lachenalii (E), H. murorum (OF), Species are listed in alphabetical order within the H. pilosella, H. umbellatum, Hottonia palustris, Humulus classes. Following additional information is provided in lupulus, Hypericum perforatum, Hypochoeris radicata, the parentheses: Impatiens noli-tangere (OF), I. parvifl ora (A), Inula brit- – the category from “red list”: V – an endangered spe- tanica (M), Isopyrum thalictroides (OF), Jasione montana cies in isolated localities, outside the main area of (E), Lamium maculatum (E), L. purpureum (A, E), Lap- distribution (Z and S ); sana communis (E), Lathraea squamaria (OF), Lathyrus – protection of species: S – strictly protected species, pratensis (M), L. vernus (OF), Leontodon autumnalis P – partially protected species (R... (M, E), Linaria vulgaris (E), Lotus uliginosus (M), Lychnis ); fl os-cuculi, Lycopus europaeus, Lysimachia nummularia, – old forests indicator species: OF (D and L. vulgaris, Lythrum salicaria, Malus domestica, M. sy- Los ); lvestris, Medicago falcata (E), M. sativa (A, E), Melampy- – species alien to the Polish fl ora: A (Z et . , rum nemorosum (OF, E), M. pratense (OF), Melandrium R ); album, Mentha aquatica, M. arvensis (M), Mercurialis I. Dembicz, P. Zaniewski, Ł. Kozub perennis (OF), Moehringia trinervia (OF), Mycelis muralis Hedera helix – partially protected, distributed over (OF), Myosotis palustris, Myosoton aquaticum, Oenothe- the whole reserve area, a few generative specimens on ra biennis (E), Oxalis acetosella (OF), Padus avium, P. se- the trunks of Betula pendula and Ulmus laevis, divisions rotina (A), Paris quadrifolia (OF), Parthenocissus inserta and . (A, E), Peucedanum oreoselinum, P. palustre, Pimpinella Lathraea squamaria – species hardly reported from saxifraga, Plantago lanceolata, P. major, Polygonum avi- the middle Mazovia (M et . ), within oak- culare, P. hydropiper, P. persicaria, Populus nigra, P. tre- hornbeam forest a few populations consisting of a few- mula, P. × canescens, Potentilla anserina, P. argentea (E), dozen fl owering shoots, divisions and . P. erecta (M), P. reptans (M), Prunella vulgaris, Prunus Lilium martagon – strictly protected, several shoots cerasifera (A), Pyrus communis (A), P. pyraster, Quer- at the foot of the sand dunes in oak-hornbeam forest, cus petraea, Q. robur, Q. rubra (A), Ranunculus acris, division . R. auricomus (OF), R. fl ammula, R. repens, Raphanus Polypodium vulgare – strictly protected, many in the raphanistrum (E), Rhamnus cathartica, Ribes nigrum forest mixed in old trenches, one by one in a clump in (P, OF), R. spicatum (OF), Rorippa amphibia, Rosa sp., alder carr, divisions and . Rubus saxatilis, R. idaeus, R. plicatus, Rumex acetosa, Succisella infl exa – category V on the Polish “red list” R. acetosella, R. crispus, R. obtusifolius, R. thyrsifl orus, (Z and S ), a population of several Salix caprea, S. cinerea, S. fragilis, Sambucus nigra, Sa- dozen individuals on a meadow, division . ponaria offi cinalis (E), Scorzonera humilis, Scrophularia Taxus baccata – strictly protected, probably outside nodosa (OF), Scuttelaria galericulata, Sedum acre (E), of the species natural range, it is possible that the seeds S. sexangulare (E), Selinum carvifolia, Senecio jacobea were brought by birds from the nearby allotments, sin- (E), S. vernalis (E), Silene nutans, S. vulgaris (E), Sisym- gle seedlings were found in a mixed forest in the south- brium offi cinale (A), Sium latifolium, Solidago canadensis western part of the reserve and in an oak-hornbeam (A), S. gigantea (A), S. virgaurea (OF), Sorbus aucuparia, forest in its southern part, divisions and . Spergula morisonii (E), Stachys palustris, S. sylvatica (OF), Stellaria graminea, S. holostea (OF), S. media, S. nemorum (OF), S. palustris, Succisella infl exa (V, S, M), DISCUSSION Symphytum offi cinale, Tanacetum vulgare (E), Taraxacum offi cinale, Thalictrum fl avum (M), Th. lucidum (M), Tilia Flora of the reserve “Puszcza Słupecka” can be re- cordata, Torilis japonica, Tragopogon pratensis (E), Trien- garded as a relatively rich and comparable to species talis europaea (OF), Trifolium arvense (E), T. campestre lists from similar objects in central Poland such as (E), T. pratense (M), T. repens (E), Ulmus laevis, Urtica “Mokry Jegiel” reserve ( species – W et . dioica, Vaccinium myrtillus (OF), V. vitis-idaea (OF), Ver- ), “Las Bielański” reserve ( species – S- bascum nigrum, Veronica chamaedrys, V. dilleni (E), V. -W , , S-G et . longifolia (M), V. offi cinalis, Viburnum opulus (P), Vicia , P ). The relative plant species angustifolia (E), V. arvensis (E), V. cracca (E), V. reichen- richness of the reserve may result from the diversity of bachiana (OF), V. riviniana (OF), Viscum album. habitats within its borders. It includes oak-hornbeam Liliopsida forests, riparian forests, coniferous forests as well as al- Agrostis capillaris, A. stolonifera, Alopecurus pratensis der carr and the meadow area. In addition, proximity to (M, E), Anthoxanthum odoratum, Bromus hordeaceus metropolitan area of Warsaw and man-altered habitats (E), Calamagrostis arundinacea, C. epigejos, Carex acuta, result in a presence of a group of kenophytes, which also C. acutiformis, C. digitata (OF), C. ericetorum, C. hirta (E), increases the number of species in the reserve. C. nigra, C. ovalis (E), C. praecox (E), C. riparia, C. vesica- Alien species represent more than % of the fl ora of ria, C. vulpina, Convallaria majalis (OF, P), Corynephorus the reserve “Puszcza Słupecka”. Most of the recorded canescens (E), Dactylis glomerata, Danthonia decumbens, kenophytes are species permanently and for long time Deschampsia caespitosa, Elymus repens, Epipactis helle- established in Polish fl ora (Z et . , R- borine (OF), Festuca gigantea (OF), F. ovina, F. rubra, Ga- ). Most of them grow at the edges of the reserve gea lutea (OF), Glyceria fl uitans (E), G. maxima, Holcus near the roads. Only Impatiens parvifl ora and Solidago mollis, Iris pseudacorus, Juncus eff usus, J. tenuis (E, A), gigantea are common in the forests of the reserve, while Lemna minor, Lilium martagon (OF, S), Lolium perenne Echinocystis lobata abundantly overgrows an edge of the (E), Luzula campestris, L. multifl ora, L. pilosa (OF), Ma- meadow. In comparison with reserves located far from ianthemum bifolium (OF), Melica nutans (OF), Millium urban areas the ratio of kenophytes in the reserve fl ora eff usum (OF), Molinia caerulea (M), Phalaris arundinacea, is relatively high (W et . ), but in fl ora Phleum pratense, Poa compressa, P. nemoralis (OF), P. of a reserve, situated among the build-up areas as “Las pratensis, Polygonatum multifl orum (OF), P. odoratum Bielański” that ratio is even higher (S-W- (OF), Sagittaria sagittifolia, Scirpus sylvaticus. , , S-G et . , P- ). Remarks on distribution and abundance of selected Within the “Puszcza Słupecka” reserve borders, plant species species considered as indicators of old forests (D- Daphne mezereum – strictly protected, a few speci- and L ) were found. This number falls mens in the oak-hornbeam forest, division . within the range of old forest indicator species num- Epipactis helleborine – strictly protected, single in- bers in complexes of deciduous forests with well-doc- dividuals at roadsides and within oak-hornbeam forest umented continuity of the forest and similar area. For communities, divisions and . example, the numbers of old forest indicator species “Puszcza Słupecka” Nature Reserve near Warsaw as an example of a young forest abundant in ancient-forest species in the reserves surveyed so far were as follows: “Las old deciduous forests. The number of those species is Bielański” – species (S-W , comparable with other forests in central and north-east- , S-G et . , P ern Poland, which have documented forest continuity. ); “Puszcza Mariańska” – species (J- This evokes a discussion on the use of species consid- -G and Ł ), “Kozi Rynek” – species ered as indicative of old-growth forests to determine the (P et . ). However, “Puszcza Słupec- ecological continuity of a forest site. The example of the ka” reserve was not yet covered by forest years ago “Puszcza Słupecka” reserve proves that this type of as- (M ... ). According to D and sessment should be supported by other criteria, if they L () the presence of a relatively large number are available. of old-forest indicator species should be the evidence of ecological continuity of the forest ecosystem at a given Acknowledgments location. Indicator species of old forests tend to have We would like to thank dr. Anna Namura-Ochalska weak dispersal ability at large distances. They often re- and dr. Jan Chojnacki from the Department of Plant produce vegetatively, and their seeds do not have adap- Ecology and Environmental Conservation, University of tations to the long-distance dispersal as dominant ways Warsaw, for providing us with their unpublished materi- of diaspore propagation is myrmekochory or autochory als. We also thank the anonymous reviewers for valu- (D and L , M , G and able comments which helped to signifi cantly improve G ). the manuscript. The relative abundance of old-forest indicator spe- cies within the reserve borders may be associated with the presence of the Czarna river watercourse, and its REFERENCES extensive fl ooding. Diaspores of old-forest species could be transported by water from upstream areas of C D //EEC of May on the the catchment. The role of fl ooding in dispersal of for- conservation of natural habitats and of wild fauna est plant species was highlighted by J et . and fl ora (OJ L , .., p. ). (). Another hypothesis involves the possibility of D Z., L S. (): Species richness and presence in the past small forest enclaves were not pre- seed dispersal to secondary woods in Southern Po- sented in the maps. Those wooded patches could have land. J. Biogeogr. , : -. been constant environmental islands enabling the sur- D Z., L S. (): Wskaźnikowe gatun- vival of old-forest species (see J et . ). ki roślin starych lasów i ich znaczenie dla ochrony przyrody i kartografi i roślinności. Pr. Geogr. Inst. The proximity of the “Łęgi Czarnej Strugi” reserve that Geogr. Przestrz. Zagosp. PAN : -. conserves patches of well-preserved oak-hornbeam and F J.B. (): Kartografi a geobotaniczna. Part . riparian forests rich in species regarded as old-forest Zagadnienia ogólne, kartografi a fl orystyczna i fi to- indicators, may be also important. In that reserve Aego- geografi czna. Państwowe Przedsiębiorstwo Wydaw- podium podagraria, Anemone nemorosa, A. ranunculo- nictw Kartografi cznych, Warszawa. ides, Asarum europaeum, Chrysosplenium alternifolium, G E.V., G S.N. (): Seed dispersal by ants in Corydalis solida, Galeobdolon luteum, Hepatica nobilis, a deciduous forest ecosystem: Mechanisms, strate- Isophyrum thalictroides, Lathraea squamaria, Mercurialis gies, adaptations. Kluwer, Boston. perennis, Millium eff usum, Oxalis acetosella, Ranunculus H M., H O., F L., G-B lanuginosus, Stellaria holostea oraz S. nemorum were re- C., L J.E. (): An ecological comparison corded (N-O unpublished, C between ancient and other forest plant species of Eu- personal communication). The “Łęgi Czarnej Strugi” rope, and the implications for forest conservation. reserve is separated from the “Puszcza Słupecka” by an Biol. Conserv. : -. paved road, which was already visible on the WIG maps J-G J., Ł A. (): Szata roślin- in (M ... ). Although this road na rezerwatu leśnego „Puszcza Mariańska” oraz jej is a barrier for species with no adaptations for long- zmiany po latach ochrony. Parki Nar. Rez. Przyr. distance diaspore transfer, it can be assumed that the , : -. animals crossing the road may become a vector for many J A., S G., C O., C- of them (see J et . ). -K D., S R., G-M E., D It is not clear whether the biodiversity or the con- G. (): Drivers of plant species assemblages in for- tinuity of ecological processes should be considered as est patches among contrasted dynamic agricultural more important from the conservational point of view landscapes. J. Ecol. , : -. (N and A ). We believe, that the J B., P E., S R. (): presence of many old-forest indicator species in the The European bison as seed dispersers: the eff ect on reserve is a sign of a quick regeneration of the forest the species composition of a disturbed pine forest patches and this processes are worth to be protected. community. Botany : -. J M.E., N C., N E. (): Do riv- ers function as corridors for plant dispersal? J. Veg. CONCLUSIONS Sci. : -. K J. (): Geografi a regionalna Polski. Wyd. “Puszcza Słupecka” reserve is an interesting forest, Nauk. PWN, Warszawa. which despite the lack of continuity, is inhabited by M Polski. Arkusz P S Warszawa a large number of vascular plant species indicative for Północ. (), WIG, Warszawa. I. Dembicz, P. Zaniewski, Ł. Kozub

M G.R. (): Plant species migration in Switzerland, Schweizerische Forstverein. Schweiz. a mixed-history forest landscape in eastern North Z. Forstwes. , : -. America. Ecology , : -. S-G B., N-O A., S- M Z., P-M H., Z A., Z M. E. (): Long-term dynamics of a relict an- (): Flowering plants and pteridophytes of Po- cient forest in an urban area. Fragm. Florist. Geobot. land – a checklist. In: Biodiversity of Poland. Vol. . , : -. Ed. Z. Mirek. W. Szafer Institute of Botany, Polish S-W B. (): Szata roślinna lasu. In: Academy of Sciences, Kraków. Las Bielański w Warszawie. Rezerwat Przyrody. Eds N B., A T. (): Conceptual problems T. Baum, P. Trojan. PWN, Warszawa: -. of ecological continuity and its bioindicators. Biodiv- S-W B. (): Flora – rośliny naczy- ers. Conserv. : -. niowe. In: Przyroda Bielan Warszawskich. Ed. M. P P. (): Corydalis intermedia (L.) Merat Luniak. Muzeum Instytutu Zoologii PAN, Warsza- ponownie odnaleziona w Warszawie. Fragm. Florist. wa: -. Geobot. : -. W M., M P., S P., K M. P P., W D., Z P., K- (): Charakterystyka fl ory naczyniowej rezerwatu Ł., D I., J F., G M., „Mokry Jegiel” i jego otoczenia. Parki Nar. Rez. Przyr. Z R., B Ł. (): Flora roślin na- , : -. czyniowych rezerwatu Kozi Rynek w Puszczy Augu- Z A. (): Atlas of distribution of vascular plants stowskiej. Parki Nar. Rez. Przyr. -: -. in Poland (ATPOL). Taxon , -: -. P G.F. (): A method for assessing woodland Z A., Z M., T-G B. (): Keno- fl ora for conservation using indicator species. Biol. phytes in the fl ora of Poland: list, status and origin. Conserv. , : -. Phytocoenosis . Suppl. Cartograph. Geobot. : P P S. O fi cjalny Serwis -. Informacyjny Gminy Nieporęt. Offi cial Information Z K., S Z. (): Red list of the vascu- Service of the Nieporęt municipality. Uzyskano z: lar plants in Poland. In: Red list of plants and fungi http://www.nieporet.pl/aktualnosci/arch_-/ in Poland. Eds Z. Mirek, K. Zarzycki, W. Wojewoda, artykul_-_a.html (stan na --). Z. Szeląg. W. Szafer Institute of Botany, Polish Acad- R J., G I., G V.S., S M. emy of Sciences, Kraków: -. (): Use of indicator species to assess forest conti- Z S. (): Restoration of natural broad-leaved nuity: a critique. Conserv. Biol. , : -. woodland in Central Europe on sites with conifer- R Ministra Środowiska z dnia lipca ous forest plantations. For. Ecol. Manage. : -. r. w sprawie gatunków dziko występujących roślin objętych ochroną. (). Dz.U. nr , poz. . For citation: Dembicz I., Zaniewski P., Kozub Ł. (): R L. (): Klucz do oznaczania roślin na- “Puszcza Słupecka” Nature Reserve near Warsaw as an ex- czyniowych Polski niżowej. Wyd. Nauk. PWN, War- ample of a young forest abundant in ancient-forest species. szawa. Rocz. AR Pozn. , Bot. Stec. : -. S P. (): Confl icts of interest between sil- viculture and nature and landscape conservation.