11 results on '"Kotze, D. Johan"'
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2. sj-pdf-4-jpe-10.1177_0739456X221082502 – Supplemental material for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning
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Galan, Juanjo and Kotze, D. Johan
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FOS: Social and economic geography ,120599 Urban and Regional Planning not elsewhere classified - Abstract
Supplemental material, sj-pdf-4-jpe-10.1177_0739456X221082502 for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning by Juanjo Galan and D. Johan Kotze in Journal of Planning Education and Research
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- 2022
- Full Text
- View/download PDF
3. sj-pdf-3-jpe-10.1177_0739456X221082502 – Supplemental material for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning
- Author
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Galan, Juanjo and Kotze, D. Johan
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FOS: Social and economic geography ,120599 Urban and Regional Planning not elsewhere classified - Abstract
Supplemental material, sj-pdf-3-jpe-10.1177_0739456X221082502 for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning by Juanjo Galan and D. Johan Kotze in Journal of Planning Education and Research
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- 2022
- Full Text
- View/download PDF
4. sj-pdf-2-jpe-10.1177_0739456X221082502 – Supplemental material for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning
- Author
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Galan, Juanjo and Kotze, D. Johan
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FOS: Social and economic geography ,120599 Urban and Regional Planning not elsewhere classified - Abstract
Supplemental material, sj-pdf-2-jpe-10.1177_0739456X221082502 for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning by Juanjo Galan and D. Johan Kotze in Journal of Planning Education and Research
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- 2022
- Full Text
- View/download PDF
5. sj-pdf-2-jpe-10.1177_0739456X221082502 – Supplemental material for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning
- Author
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Galan, Juanjo and Kotze, D. Johan
- Subjects
FOS: Social and economic geography ,120599 Urban and Regional Planning not elsewhere classified - Abstract
Supplemental material, sj-pdf-2-jpe-10.1177_0739456X221082502 for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning by Juanjo Galan and D. Johan Kotze in Journal of Planning Education and Research
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- 2022
- Full Text
- View/download PDF
6. sj-pdf-4-jpe-10.1177_0739456X221082502 – Supplemental material for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning
- Author
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Galan, Juanjo and Kotze, D. Johan
- Subjects
FOS: Social and economic geography ,120599 Urban and Regional Planning not elsewhere classified - Abstract
Supplemental material, sj-pdf-4-jpe-10.1177_0739456X221082502 for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning by Juanjo Galan and D. Johan Kotze in Journal of Planning Education and Research
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- 2022
- Full Text
- View/download PDF
7. sj-pdf-3-jpe-10.1177_0739456X221082502 – Supplemental material for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning
- Author
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Galan, Juanjo and Kotze, D. Johan
- Subjects
FOS: Social and economic geography ,120599 Urban and Regional Planning not elsewhere classified - Abstract
Supplemental material, sj-pdf-3-jpe-10.1177_0739456X221082502 for Pedagogy of Planning Studios for Multidisciplinary, Research-Oriented, Personalized, and Intensive Learning by Juanjo Galan and D. Johan Kotze in Journal of Planning Education and Research
- Published
- 2022
- Full Text
- View/download PDF
8. Forty years of carabid beetle research in Europe – from taxonomy, biology, ecology and population studies to bioindication, habitat assessment and conservation
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Kotze, D. Johan, Brandmayr, Pietro, Casale, Achille, Dauffy-Richard, Emmanuelle, Dekoninck, Wouter, Koivula, Matti, Lovei, Gabor, Mossakowski, Dietrich, Noordijk, Jinze, Paarmann, Wilfried, Pizzoloto, Roberto, Saska, Pavel, Schwerk, Axel, Serrano, Jose, Szyszko, Jan, Taboada Palomares, Angela, Turin, Hans, Venn, Stephen, Vermeulen, Rikjan, and Zetto Brandmayr, Tullia
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life history ,biology ,ant feeding ,conservation ,predation on amphibians ,pitfall trapping ,ground beetle ,long-term research ,ectoparasitism ,statistics ,seed feeding ,bioindicators ,population dynamics ,Carabidae ,rhythms ,systematics ,dispersal ,habit - Abstract
‘Carabidologists do it all’ (Niemelä 1996a) is a phrase with which most European carabidologists are familiar. Indeed, during the last half a century, professional and amateur entomologists have contributed enormously to our understanding of the basic biology of carabid beetles. The success of the field is in no small part due to regular European Carabidologists’ Meetings, which started in 1969 in Wijster, the Netherlands, with the 14th meeting again held in the Netherlands in 2009, celebrating the 40th anniversary of the first meeting and 50 years of long-term research in the Dwingelderveld. This paper offers a subjective summary of some of the major developments in carabidology since the 1960s. Taxonomy of the family Carabidae is now reasonably established, and the application of modern taxonomic tools has brought up several surprises like elsewhere in the animal kingdom. Progress has been made on the ultimate and proximate factors of seasonality and timing of reproduction, which only exceptionally show non-seasonality. Triggers can be linked to evolutionary events and plausibly explained by the “taxon cycle” theory. Fairly little is still known about certain feeding preferences, including granivory and ants, as well as unique life history strategies, such as ectoparasitism and predation on higher taxa. The study of carabids has been instrumental in developing metapopulation theory (even if it was termed differently). Dispersal is one of the areas intensively studied, and results show an intricate interaction between walking and flying as the major mechanisms. The ecological study of carabids is still hampered by some unresolved questions about sampling and data evaluation. It is recognised that knowledge is uneven, especially concerning larvae and species in tropical areas. By their abundance and wide distribution, carabid beetles can be useful in population studies, bioindication, conservation biology and landscape ecology. Indeed, 40 years of carabidological research have provided so much data and insights, that among insects - and arguably most other terrestrial organisms - carabid beetles are one of the most worthwhile model groups for biological studies.
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- 2011
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9. Landscape adaptation to climate change: Local networks, social learning and co-creation processes for adaptive planning
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Juanjo Galan, Francisco Galiana, D. Johan Kotze, Kevin Lynch, Daniele Torreggiani, Bas Pedroli, Galan, Juanjo, Galiana, Francisco, Kotze, D. Johan, Lynch, Kevin, Torreggiani, Daniele, Pedroli, Bas, Department of Architecture, Polytechnic University of Valencia, University of Helsinki, National University of Ireland, Galway, Universita di Bologna, Wageningen University and Research Centre, Aalto-yliopisto, Aalto University, Ecosystems and Environment Research Programme, Helsinki Institute of Sustainability Science (HELSUS), Helsinki Institute of Urban and Regional Studies (Urbaria), Fifth Dimension - Vegetated roofs and walls in urban areas, and Urban Ecosystems
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Global and Planetary Change ,WIMEK ,Ecology ,Landscape planning ,Local networks ,Landschapsarchitectuur en Ruimtelijke Planning ,Co-creation ,Geography, Planning and Development ,Climate change adaptation ,Management, Monitoring, Policy and Law ,Community planning ,Landscape Architecture and Spatial Planning ,Participatory planning ,1172 Environmental sciences - Abstract
Funding Information: This work was supported by EIT-CLIMATE-KIC [grant number TC_2.1.5_190294_P018-1A, 2019]. The sponsor was not involved in the preparation of the article. Publisher Copyright: © 2022 The Authors The development of legitimate, operative, and feasible landscape adaptation planning for climate change is dependent on the specific characteristics of the landscape and its inhabitants. Spatial patterns, culture, governance systems, socio-economic structures, planning methods, history, and collectively envisioned futures need to be accommodated. The literature suggests that landscape is a complex and dynamic socio-ecological system, the management and adaptation of which requires systemic and integrative approaches to respond to a wide variety of drivers of change, challenges, and interests. Based on activities developed in 15 European pilot landscapes, we identify some of the key factors and conditions affecting the generation of representative local networks for landscape adaptation to climate change. We illustrate how social learning and co-creation processes can be implemented in them and how their co-produced outcomes can help local communities overcome barriers and address critical issues in adaptive planning. Our results provide a framework for the creation of similar networks in other landscapes, exploring at the same time the interactions between the composition of networks, social learning, and the quality of the co-produced outputs as a fundamental step for the development of Landscape Adaptation Plans to Climate Change.
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- 2023
10. On the deterioration and restoration of mire invertebrate communities
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Norbertas Noreika, University of Helsinki, Faculty of Biological and Environmental Sciences, Department of Biosciences, Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta, biotieteiden laitos, Helsingfors universitet, bio- och miljövetenskapliga fakulteten, biovetenskapliga institutionen, Sadler, Jonathan, and Kotze, D. Johan
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ecology and Evolutionary Biology - Abstract
Negative anthropogenic disturbances (e.g., drainage and urbanization) are causing biotic homogenization through the replacement of specialist species with generalists. The identification and conservation of biodiversity hotspots within degraded (e.g., highly urbanized) landscapes, and ecological restoration (i.e., positive anthropogenic disturbance) have the potential to be important tools to counteract these negative effects. Mires are suitable targets for the investigation of these homogenization-reducing activities since they host many mire specialist species of, e.g. invertebrates. The main aim of this PhD thesis was to investigate the effects of negative anthropogenic disturbances [urbanization (Chapter I) and drainage for forestry (Chapters II-IV)] on the invertebrate communities of boreal mires and how effective efforts are to reverse these negative effects through ecological restoration [i.e. positive anthropogenic disturbance (Chapters II-IV)]. In addition, the purpose was to determine which environmental variables are key in supporting mire specialist invertebrate species and communities. Therefore, this thesis started by reviewing current knowledge on the responses of mire invertebrate species and communities to anthropogenic disturbances. The effects of urbanization were studied on spiders and carabid beetles (Chapter I), while the effects of drainage for forestry and subsequent restoration were investigated on five solitary invertebrate groups (Chapter II) and social insects, i.e. ants (Chapter III). Finally, a powerful Before-After Control-Impact (BACI) design was used to reveal the effects of drainage and restoration on butterflies (Chapter IV). Generally, both high levels of urbanization (Chapter I) and mire drainage for forestry (Chapters II-IV) had negative effects on mire specialist species (lower abundances) and invertebrate communities (homogenized and very different in structure from pristine mire communities). However, these detrimental effects can be reduced or even reversed through appropriate urban mire conservation and ecological restoration. Local habitat conditions were shown to be particularly important for the survival of specialist invertebrate species in urban mires (Chapter I) and for the successful recovery of restored mire invertebrates (Chapters II-IV). Individual mire specialist species responded negatively to environmental variables associated with deteriorated (i.e. drained or highly urbanized) mire conditions [number of high (> 3m) trees for carabid beetles, crane flies, micromoths (Chapter II), ants (Chapter III) and butterflies (Chapter IV)] and positively to pristine mire-associated variables [Sphagnum cover for carabid beetles and spiders (Chapters I-II), crane flies (Chapter II) and suggestively for ants (Chapter III); larval food plant cover and number of lower (1.5 - 3m) trees for butterflies (Chapter IV)]. The more specialized the mire species were, the more negatively they were affected by deteriorated-mire-associated variables and the more positively they responded to pristine-mire-associated variables. I conclude that the restoration actions taken (removing tall trees but leaving smaller trees, and raising the water table level) are appropriate in creating suitable habitat conditions for mire invertebrates, as both individual specialist species and communities showed positive responses already 1-3 years since restoration (Chapters II-IV). Finally, the appropriate restoration actions in well-prioritized locations as well as urban mire conservation should reverse the trend of biotic homogenization. Biologinen homogenisaatio eli samankaltaistuminen aiheuttaa usein erikoistuneiden spesialistilajien korvautumisen yleislajeilla, generalisteilla. Homogenisaatio on seurausta haitallisesta ihmistoiminnasta, kuten elinympäristöjen kuivattamisesta tai urbanisoitumisesta. Monimuotoisimpien elinympäristöjen tunnistaminen, suojelu ja ennallistaminen ovat keinoja torjua näitä haitallisia muutoksia. Soiden erikoistunut selkärangatonlajisto tarjoaa mahdollisuuden tutkia kuinka lajiston yksipuolistumista voitaisiin vähentää. Tämän tutkimuksen tarkoituksena oli selvittää miten ympäristölle haitallinen ihmistoiminta kuten urbanisaatio (Artikkeli I) ja metsänojitus (Artikkelit II-IV) vaikuttavat boreaalisen vyöhykkeen soiden selkärangatonlajiston rakenteeseen ja kuinka havaittuja negatiivisia muutoksia lajistossa on onnistuttu torjumaan tai vähentämään aktiivisilla ennallistamistoimilla. Tutkimuksessa pyrittiin myös tunnistamaan, mitkä ympäristötekijät ovat soihin erikoistuneen lajiston kannalta keskeisimpiä ja miten suolajisto reagoi haitalliseen ihmistoimintaan. Kaupungistumisen vaikutuksia selkärangatonyhteisöihin tutkittiin hämähäkeillä ja maakiitäjäisillä (Artikkeli I). Metsänojituksen ja ennallistamisen vaikutuksia lajiyhteisöihin tutkittiin viidellä eri selkärangatonryhmällä (Artikkeli II) ja sosiaalisilla hyönteisillä (muurahaisilla) (Artikkeli III). Artikkelissa neljä metsänojituksen ja ennallistamisen vaikutuksia perhosten lajistorakenteeseen päästiin tutkimaan ennen ennallistamistoimia ja sen jälkeen. Sekä kaupungistuminen (Artikkeli I) että metsänojitus (Artikkelit II-IV) johtivat suoympäristöön erikoistuneiden selkärangattomien taantumiseen ja lajiston yksipuolistumiseen ja muuttumiseen hyvin erilaiseksi kuin luonnontilaisilla soilla. Näitä kielteisiä muutoksia on kuitenkin mahdollista lieventää tai jopa kokonaan välttää soiden suojelulla ja ennallistamisella. Paikalliselin ympäristön piirteillä on erittäin suuri merkitys erikoistuneen selkärangatonlajiston menestykseen sekä urbaaneilla alueilla olevilla soilla (Artikkeli I) että ojitetuilla ja ennallistetuilla soilla (Artikkelit II-IV). Suoympäristöön erikoistunut lajisto taantui ihmistoiminnan lisääntyessä soilla. Ympäristömuuttujista yli 3 metristen puiden runsastumisen havaittiin vähentävän maakiitäjäisten, vaaksiaisten, mikroperhosten, muurahaisten ja perhosten suolajistoa. Luonnontilaisilla soilla runsaana esiintyvän rahkasammalen (Sphagnum) peittävyys puolestaan korreloi positiivisesti suolajiston runsauden kanssa, etenkin maakiitäjäisillä ja hämähäkeillä (Artikkeli I), vaaksiaisilla (Artikkeli II) ja viitteellisesti myös muurahaisilla (Artikkeli III). Matala puusto (1,5-3 m) ja toukkien ravintokasvien peittävyys olivat soiden perhoslajistolle (Artikkeli IV) keskeisimmät ympäristömuuttujat. Mitä erikoistuneempi soiden selkärangatonlajisto oli, sitä enemmän se oli riippuvainen luonnontilaisten soiden rakennepiirteistä ja sitä herkemmin ne reagoivat haitalliseen ihmistoimintaan. Soiden ennallistamistoimet (korkeiden puiden poisto, pienten puiden jättäminen ja veden pinnan nosto) osoittautuivat toimiviksi keinoksi palauttaa ja ylläpitää soiden rakennepiirteitä ja luoda sopivaa elinympäristöä vaateliaille suolajeille. Jo 1-3 vuoden kuluttua ennallistamisesta oli alueen selkärangatonlajisto kehittynyt siten, että osa erikoistuneista ja vaateliaista suolajeista oli runsastunut ja lajistorakenne oli kehittymässä kohti luonnontilaisten soiden lajiston rakennetta. Soiden ennallistaminen osoittautui toimivaksi keinoksi hillitä selkärangatonlajiston homogenisaatiota. Ennallistamisen kohdentaminen arvokkaisiin suoluontokohteisiin on hyödyllistä, mutta hyviä tuloksia voi saada aikaan myös pienialaisilla soilla kaupungeissa.
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- 2016
11. The effects of habitat edges and trampling intensity on vegetation in urban forests
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Hamberg, Leena, University of Helsinki, Faculty of Biosciences, Department of Biological and Environmental Sciences, Finnish Forest Research Institute, Vantaa Research Unit, Helsingin yliopisto, biotieteellinen tiedekunta, bio- ja ympäristötieteiden laitos, Helsingfors universitet, biovetenskapliga fakulteten, institutionen för bio- och miljövetenskaper, Tolvanen, Anne, Kotze, D. Johan, Lehvävirta, Susanna, and Niemelä, Jari
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bio- ja ympäristötieteet - Abstract
Although changes in urban forest vegetation have been documented in previous Finnish studies, the reasons for these changes have not been studied explicitly. Especially, the consequences of forest fragmentation, i.e. the fact that forest edges receive more solar radiation, wind and air-borne nutrients than interiors have been ignored. In order to limit the change in urban forest vegetation we need to know why it occurs. Therefore, the effects of edges and recreational use of urban forests on vegetation were investigated together in this thesis to reveal the relative strengths of these effects and to provide recommendations for forest management. Data were collected in the greater Helsinki area (in the cities of Helsinki, Vantaa and Espoo, and in the municipalities of Sipoo and Tuusula) and in the Lahti region (in the city of Lahti and in the municipality of Hollola) by means of systematic and randomized vegetation and soil sampling and tree measurements. Sample plots were placed from the forest edges to the interiors to investigate the effects of forest edges, and on paths of different levels of wear and off these paths to investigate the effects of trampling. The natural vegetation of mesic and sub-xeric forest site types studied was sensitive both to the effects of the edge and to trampling. The abundances of dwarf shrubs and bryophytes decreased, while light- and nitrogen-demanding herbs and grasses - and especially Sorbus aucuparia – were favoured at the edges and next to the paths. Results indicated that typical forest site types at the edges are changing toward more nitrophilic vegetation communities. Covers of the most abundant forest species decreased considerably – even tens of percentages – from interiors to the edges indicating strong edge effects. These effects penetrated at least up to 50 m from the forest edges into the interiors, especially at south to west facing open edges. The effects of trampling were pronounced on paths and even low levels of trampling decreased the abundances of certain species considerably. The effects of trampling extended up to 8 m from path edges. Results showed that the fragmentation of urban forest remnants into small and narrow patches should be avoided in order to maintain natural forest understorey vegetation in the urban setting. Thus, urban forest fragments left within urban development should be at least 3 ha in size, and as circular as possible. Where the preservation of representative original forest interior vegetation is a management aim, closed edges with conifers can act as an effective barrier against solar radiation, wind and urban load, thereby restricting the effects of the edge. Tree volume at the edge should be at least 225-250 m3 ha-1 and the proportion of conifers (especially spruce) 80% or more of the tree species composition. Closed, spruce-dominated edges may also prevent the excessive growth of S. aucuparia saplings at urban forest edges. In addition, closed edges may guide people’s movements to the maintained paths, thus preventing the spontaneous creation of dense path networks. In urban areas the effects of edges and trampling on biodiversity may be considerable, and are important to consider when the aim of management is to prevent the development of homogeneous herb-grass dominated vegetation communities, as was observed at the investigated edges. Taajama-alueilla sijaitsevien metsien aluskasvillisuuden muuttumista on selitetty tähän asti lähinnä virkistyskäytön aiheuttamalla tallauksella. Kuitenkin auringonvalo, tuuli ja ilman epäpuhtaudet pääsevät helposti tunkeutumaan metsään reunojen kautta, mikä muuttaa metsälajiston elinympäristöä valoisammaksi, kuivemmaksi ja ravinteikkaammaksi. Tämän ilmiön vaikutuksia taajamametsien aluskasvillisuuteen ei ole tutkittu aiemmin Suomessa, vaikka taajamametsät ovat usein kooltaan pieniä ja reuna-alueiden osuus koko metsän pinta-alasta on suuri. Jotta laajamittaista taajamametsien kasvillisuuden muuttumista voitaisiin välttää, olisi tunnettava syyt, jotka muuttumista aiheuttavat. Tässä väitöskirjassa tutkittiin samanaikaisesti sekä reunan että tallauksen vaikutuksia, jotta saataisiin selville näiden tekijöiden suhteellinen merkitys aluskasvillisuuden muuttumisessa. Tutkimusaineisto kerättiin pääkaupunkiseudun taajamametsistä (Helsingistä, Vantaalta, Espoosta, Sipoosta ja Tuusulasta) sekä Lahden seudulta (Lahdesta ja Hollolasta) käyttäen systemaattista ja satunnaista otantaa kasvillisuuden, maaperän ja puuston tutkimiseksi. Näytealoja sijoitettiin metsien reunoilta sisäosiin (reunavaikutuksen tutkiminen) ja eriasteisesti kuluneille poluille ja polkujen ulkopuolelle (tallauksen vaikutusten tutkiminen). Tutkitut metsätyypit olivat mustikka- ja puolukkatyypin kankaita sekä lehtomaisia kankaita. Kasvillisuus oli herkkää sekä reunan että tallauksen vaikutuksille. Varvut ja sammalet vähenivät reunavaikutuksen ja tallauksen vuoksi, kun taas valosta ja typestä hyötyvät ruohot, heinät ja pihlaja menestyivät metsien ja polkujen reunoilla. Tulosten perusteella näyttää siltä, että tyypillinen metsäkasvilajisto on muuttumassa taajamametsien reunoilla ravinteisuutta paremmin sietäväksi. Todellisten metsälajien runsaudet olivat huomattavasti alhaisemmat reunoilla kuin metsien sisäosissa. Tämä vaikutus ulottui ainakin 50 metriä metsän sisään erityisesti avoimilla etelä-länsi reunoilla. Tallauksen vaikutukset metsäkasvillisuuteen olivat luonnollisesti voimakkaita poluilla. Jo 70-270 tallauskertaa vähensi tutkittujen kasvilajien runsauksia yli 50%. Myös pitkään tallattujen polkujen ulkopuolella havaittiin muutoksia kasvilajien runsauksissa. Nämä vaikutukset ulottuivat jopa kahdeksaan metriin asti polun reunasta. Tulokset osoittivat, että metsien pirstomista pieniksi ja kapeiksi metsiköiksi pitäisi välttää, jotta luontainen metsäkasvillisuus voisi säilyä taajama-alueilla. Metsien olisikin oltava kompakteja (lähinnä pyöreitä) ja vähintään kolmen hehtaarin kokoisia, jotta metsien sisään jäisi metsäkasvilajistolle sopivia elinympäristöjä. Suljetut havupuuvaltaiset reunat pystyvät lieventämään reunan aiheuttamia vaikutuksia aluskasvillisuuteen. Jos siis tavoitteena on metsäkasviyhteisöjen säilyttäminen, puuta pitäisi olla reunoilla 225–250 m3 ha-1 ja kuusen osuuden vähintään 80% tästä määrästä. Suljetut, kuusivaltaiset reunat saattavat hillitä myös liiallista pihlajantaimien runsastumista taajamametsien reunoilla sekä ohjata ulkoilijoiden liikkumista rakennetuille poluille, mikä puolestaan vähentää tiheän rakentamattoman polkuverkoston muodostumista. Polkujen välisen etäisyyden pitäisikin olla vähintään 20 metriä, jotta väliin jäisi alue, jonne polun vaikutukset eivät ulotu.
- Published
- 2009
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