'Luonto' ympäristöarvojen tastalla

Tutkielman tavoitteena on selvittää sanan ‘luonto’ merkitystä ja käyttöä ympäristöfilosofisessa keskustelussa. Mielenkiinnon kohteena on erityisesti se, voidaanko tällä käsitteellä perustella ympäristöarvoja ja voidaanko näillä arvoilla katsoa olevan moraalista velvoittavaa voimaa. Sanalle ‘luonto’ löytyy kaksi kilpailevaa määritelmää, joita käytetään ympäristöfilosofisissa teorioissa rinnakkain tai niistä valitaan toinen. Näiden luonto-käsitteen määritelmien voidaan katsoa olevan läpikäydyn aineiston perusteella yleisesti hyväksyttyjä. Niitä ei kuitenkaan perustella huolella, vaan tyydytään vallitsevaan käsitykseen sitä kyseenalaistamatta. Tästä syystä tämän tutkielman kysymyksenasettelulle on ympäristöfilosofiassa tarvetta. Tutkielma on luonteeltaan analyyttinen. Lähdeaineistoksi on valittu historiallisten auktoriteettien lisäksi modernin ympäristöfilosofian puhutuimpia ja kiistellyimpiä näkökulmia. Historiallisten auktoriteettien tärkein ominaisuus tämän tutkielman kannalta on niiden riippumattomuus modernista ympäristöajattelusta, jolla on omat ennakkokäsityksensä ja asenteensa painolastinaan. Keskeisinä lähteinä ovat: John O’Neillin, Alan Hollandin ja Andrew Lightin Environmental Values; John Stuart Millin On Nature ja Robert Elliotin Faking Nature. J. S. Millin On Nature -essee, jossa luonto-käsitteelle löydetään ympäristöfilosofiassa yhä käytettävät kaksi määritelmää. Näitä ‘luonnon’ määritelmiä syvennetään modernien ympäristöfilosofien ajatuksilla. O.Neill ym. teoksesta on tähän tutkielmaan otettu rakenne sen esittämän kysymyksenasettelun mukaisesti. Lisäksi se tarjoaa tutkielman esittämään ympäristöarvojen moraalisen velvoittavuuden ongelmaan yhden ratkaisun. Elliotin artikkeli on tälle työlle keskeinen kahdesta syystä: ensinnäkin se toimii argumentaation kehityksen vastinparina, sillä sen sisältö on tämän tutkielman näkökulmasta ristiriitainen. Toiseksi, se onnistuu kuvaamaan ympäristöön liitettävien arvojen luonteen vahvalla intuitiivisella vertauksella taiteeseen. Näiden taidevertausten ansioista Elliotin artikkeli on kiistatta yksi modernin ympäristöfilosofian lainatuimmista ja kiistellyimmistä. Elliotin argumentaatiolinjaa jatkavat ajattelijat syventävät näitä käsityksiä entisestään ja myös O’Neill ym. saavat siitä vaikutteita omaan ajatteluunsa. Tämän tutkielman aineiston valossa voidaan todeta, että luonnolle löydetään kaksi eriävää määritelmää. Ensinnäkin ‘luonto’ määritellään tieteellisesti luonnonlaeiksi. Toisessa määritelmässään ‘luonto’ ymmärretään ei-inhimilliseksi ympäristöksi. Näiden määritelmien voidaan sanoa eroavan ensisijaisesti siinä, että jälkimmäisen määritelmän mukaisella luonnolla voidaan katsoa olevan arvoa. Tämä arvo on luonteeltaan joko välillistä tai välitöntä riippuen siitä, arvostetaanko sitä jonkin toisen arvon saavuttamisen välineenä vai sen itsensä tähden itseisarvoisesti. Näiden erilaisten ympäristöarvon lajien tunnistaminen on niiden moraalisen velvoittavuuden kannalta keskeinen tekijä. Osa ympäristöfilosofisista teorioista lähtee siitä, että luonnolla olisi objektiivinen arvonsa silloinkin kun inhimillinen moraalisubjekti ei sitä ole arvostamassa. Toisen tärkeänä huomiona on, että mikäli ‘luonto’ määritellään ei-inhimilliseksi ympäristöksi, kaikki inhimilliset luonnonsuojelutoimet osoittautuvat mahdottomiksi. Ne muuttaisivat tuon ei-inhimillisen ympäristön osaksi inhimillistä ympäristöä. Jotta moraaliselle toimijalle ympäristöarvoilla olisi merkitystä, niiden olisi oltava tämän agentin tunnistettavissa. Tutkielman aineiston valossa voidaan todeta, että vaikka ei-inhimillisellä ympäristöllä tällaista arvoa olisikin, ei se voisi ohjata moraalista toimintaamme. Lisäksi voidaan todeta, ettei tässä työssä esitetyt ympäristöfilosofiset teoriat tätä luonnonsuojelun paradoksi onnistu kiertämään. Tämän työn tärkein johtopäätös on, ettei luontoa voida suojella. Ympäristöfilosofia Etiikka

Community forestry and environmental literacy in northern Thailand : Towards collaborative natural resource management and conservation

Conservation and sustainable management of tropical forests needs a holistic approach: in addition to ecological concerns, socio-economic issues including cultural aspects must be taken into consideration. An ability to adapt practices is a key to successful collaborative natural resource management. Achieving this requires local participation and understanding of local conceptions of the environment. This study examined these issues in the context of northern Thailand. Northern uplands are the home of much of the remaining natural forest in Thailand and several ethnic minority groups commonly referred to as hill tribes. The overall purpose of this study was to grasp a regional view of an ethnically diverse forested area and to elicit prospects to develop community forestry for conservation purposes and for securing people s livelihood. Conservation was a central goal of management as the forests in the area were largely designated as protected. The aim was to study local perceptions, objectives, values and practices of forest management, under the umbrella of the concept environmental literacy, as well as the effects of forest policy on community management goals and activities. Environmental literacy refers to holistic understanding of the environment. It was used as a tool to examine people s views, interests, knowledge and motivation associated to forests. The material for this study was gathered in six villages in Chiang Mai Province. Three minority groups were included in the study, the Karen, Hmong and Lawa, and also the Thai. Household and focus group interviews were conducted in the villages. In addition, officials at district, regional and national levels, workers of non-governmental organisations, and academics were interviewed, and some data were gathered from the students of a local school. The results showed that motivation for protecting the forests existed among each ethnic group studied. This was a result of culture and traditions evolved in the forest environment but also of a need to adapt to a changed situation and environment and to outside pressures. The consequences of deforestation were widely agreed on in the villages, and the impact of socio-economic changes on the forests and livelihood was also recognised. The forest was regarded as a source of livelihood providing land, products and services essential to the people inhabiting rural uplands. Traditions, fire control, cooperation, reforestation, separation of protected and utilisable areas, and rules were viewed as central for conservation. For the villagers, however, conservation meant sustainable use, whereas the government has tended to prefer strict restrictions on forest resource use. Thus, conflicts had arisen. Between communities, cooperation was more dominant than conflict. The results indicated that the heterogeneity of forest dwellers, although it has to be recognised, should not be overemphasised: ethnic diversity can be considered as no major obstacle for successful community forestry. Collaborative management is particularly important in protected areas in order to meet the conservation goals while providing opportunities for livelihood. Forest management needs more positive incentives and increased dialogue.

Environmental change and anthropogenic impact on lake sediments during the Holocene in the Finnish - Karelian inland area

This thesis discusses the prehistoric human disturbance during the Holocene by means of case studies using detailed high-resolution pollen analysis from lake sediment. The four lakes studied are situated between 61o 40' and 61o 50' latitudes in the Finnish Karelian inland area and vary between 2.4 and 28.8 ha in size. The existence of Early Metal Age population was one important question. Another study question concerned the development of grazing, and the relationship between slash-and-burn cultivation and permanent field cultivation. The results were presented as pollen percentages and pollen concentrations (grains cm 3). Accumulation values (grains cm 2 yr 1) were calculated for Lake Nautajärvi and Lake Orijärvi sediment, where the sediment accumulation rate was precisely determined. Sediment properties were determined using loss-on-ignition (LOI) and magnetic susceptibility (k). Dating methods used include both conventional and AMS 14C determinations, paleomagnetic dating and varve choronology. The isolation of Lake Kirjavalampi on the northern shore of Lake Ladoga took place ca. 1460 1300 BC. The long sediment cores from Finland, Lake Kirkkolampi and Lake Orijärvi in southeastern Finland and Lake Nautajärvi in south central Finland all extended back to the Early Holocene and were isolated from the Baltic basin ca. 9600 BC, 8600 BC and 7675 BC, respectively. In the long sediment cores, the expansion of Alnus was visible between 7200 - 6840 BC. The spread of Tilia was dated in Lake Kirkkolampi to 6600 BC, in Lake Orijärvi to 5000 BC and at Lake Nautajärvi to 4600 BC. Picea is present locally in Lake Kirkkolampi from 4340 BC, in Lake Orijärvi from 6520 BC and in Lake Nautajärvi from 3500 BC onwards. The first modifications in the pollen data, apparently connected to anthropogenic impacts, were dated to the beginning of the Early Metal Period, 1880 1600 BC. Anthropogenic activity became clear in all the study sites by the end of the Early Metal Period, between 500 BC AD 300. According to Secale pollen, slash-and-burn cultivation was practised around the eastern study lakes from AD 300 600 onwards, and at the study site in central Finland from AD 880 onwards. The overall human impact, however, remained low in the studied sites until the Late Iron Age. Increasing human activity, including an increase in fire frequency was detected from AD 800 900 onwards in the study sites in eastern Finland. In Lake Kirkkolampi, this included cultivation on permanent fields, but in Lake Orijärvi, permanent field cultivation became visible as late as AD 1220, even when the macrofossil data demonstrated the onset of cultivation on permanent fields as early as the 7th century AD. On the northern shore of Lake Ladoga, local activity became visible from ca. AD 1260 onwards and at Lake Nautajärvi, sediment the local occupation was traceable from 1420 AD onwards. The highest values of Secale pollen were recorded both in Lake Orijärvi and Lake Kirjavalampi between ca. AD 1700 1900, and could be associated with the most intensive period of slash-and-burn from AD 1750 to 1850 in eastern Finland.

Carabid beetles (Coleoptera, Carabidae) as indicators of environmental change in Ranomafana National Park, Madagascar

Growing human populations and increasing exploitation of natural resources threaten nature all over the world. Tropical countries are especially vulnerable to human impact because of the high number of species, most of these endemic and still unknown. Madagascar is one of the centers of high biodiversity and renowned for its unique species. However, during the last centuries many endemic species have gone extinct and more are endangered. Because of high natural values, Madagascar is one of the global conservation priorities. The establishment of Ranomafana National Park (RNP) was intended to preserve the unique nature of Madagascar. Containing several endemic and threatened species, Ranomafana has been selected as one of UNESCO’s World Natural Heritage sites. However, due to strong human pressures the region immediately surroundings the protected area has severely degraded. Aims of this thesis were to inventory carabid fauna in RNP and evaluate their use as indicators of the environmental change. Carabid beetles were collected from protected area (secondary and primary forests) and from its degraded surrounding area. Collecting was mostly conducted by hand during years 2000-2005. Species compositions between the protected area and its surroundings were compared, and species habitat preferences and seasonal variations were studied. In total, 4498 individuals representing 127 carabid species (of which 38 are new species) were collected. Species compositions within and outside of the protected area were markedly different. Most of the species preferred forest as their primary habitat and were mainly collected from trees and bushes. Their value as indicators is based on their different habitat requirements and sensitivity to environmental variables. Some of the species were found only in the protected forest, some occupied also the degraded forests and some preferred open areas. Carabid fauna is very species rich in Ranomafana and there are still many species to be found. Most of the species are arboreal and probably cannot survive in the deforested areas outside the park. This is very likely also the case for other species. Establishment and continued protection of RNP is probably the only way to conserve this globally important area. However, new occupations and land use methods are urgently needed by the local people for improving their own lives while maintaining the forest intact.