Flora synantropijna Piotrkowa Trybunalskiego i Tomaszowa Mazowieckiego

Observations on the synanthropic flora of Piotrków Trybunalski and Tomaszów Mazowiecki were performed in the years 1975—1979. Moreover, species of synanthropic plants reported earlier in the literature for this area (Kulesza 1918— 1919, Mowszowicz 1960, Sowa 1971, Warcholińska 1974 a. b; are considered. In general, 644 plant species were found on anthropogenic stands of Piotrków Trybunalski and Tomaszów Mazowiecki, from this number 578 species for Piotrków (342 species not reported hitherto) and 622 species for Tomaszów (351 species noted for the first time). Biological spectrum of the species (tab. 1) points to a small predominance of perennial species over annual ones (Piotrków 51.7%, Tomaszów 52.2%). Geographical-historical analysis demonstrated a considerable predominance of apophyles (Piotrków 60.5%>, Tomaszów 62.3% — tab. 2). Among plant species of this group, most abundant were forest and scrub species (Piotrków and Tomaszów 19.3%), meadow (Piotrków 16.9%, Tomaszów 16.3%) and aquatic species (Piotrków 11.4%, To-maszów 10.G%). Among anthropophytes (Piotrków 39.5%, Tomaszów 37.7%) most frequent are archeophytes (Piotrków 18.5%, Tomaszów 17.1%) — tab. 2. Most of anthropophytes occurring on areas of the investigated towns origin from South-Europe-Western-Asiatic regions (Piotrków 30.6%, Tomaszów 31.2%) and South-European regions (Piotrków 27.1%, Tomaszów 27.7%). Less abundant are species originating from America (Piotrków 15.6%, Tomaszów 16.4%) and from other parts of Asia (Piotrków 15.6%, Tomaszów 14.3%) — tab. 3. As far as stand preference is concerned, in both town dominate species occurring on various types of stands (Piotrków 381, Tomaszów 475) — tab. 5. Numerical values of indexes of synathropization (159), modernization (0.51) and lability (72) for Tomaszów Mazowiecki are higher in comparison with those for Piotrków Trybunalski (S = 156, M = 0.48, I = 69) and point to a higher level of technological development of the former town (tab. 4).

Artykuł zawiera wyniki badań, przeprowadzonych w latach 1975—1979, nad florą synantropijną Piotrkowa Trybunalskiego (P) i Tomaszowa Mazowieckiego (T). Florę synantropijną tych miast cechuje duża różnorodność i bogactwo, co wiąże się z zróżnicowaniem siedlisk. Na terenie obu miast stwierdzono 644 gatunki, w tym 556 (86%) gatunków wspólnych. Flora synantropijna Piotrkowa Trybunalskiego liczy 578 gatunków, a Tomaszowa Mazowieckiego — 613 gatunków. Wśród roślin naczyniowych obu miast przeważają apofity (P — 60,5%, T — 62,3%).