Ilkka Hanski – författare

Checkerspot butterflies have been used as an extraordinarily successful model system for more than four decades. This volume presents the first synthesis of the broad range of studies of that system as conducted in Ehrlich's research group in Stanford, in Hanski's research group in Helsinki and elsewhere. Ehrlich's long - term research project on Edith's checkerspot helped establish an intergrated disipline of population biology in the 1960s and ever since has contributed many fundamental insights into the ecological and evolutionary dynamics of populations. Hanski's and his associates' work an the Glanville fritillary for the past 14 years has been instrumental in establishing the field of metapopulation biology and showing how theoretical and empirical work can be effectively combined in the same project.

Hanski, a leading thinker in metapopulation ecology, studies checkerspot butterfly populations in Finland. Ehrlich, one of the leading ecologists and conservation biologist, investigates checkerspot butterfly populations in California. This book reports on and synthsizes the major long-term research of both workers'' careers on the population biology of checkerspot butterflies.

From a small island in the Baltic Sea to the large tropical islands of Borneo and Madagascar, Messages from Islands is a global tour of these natural, water-bound laboratories. In this career-spanning work, Ilkka Hanski draws upon the many islands on which he has performed fieldwork to convey key themes in ecology. By exploring the islands' biodiversity as an introduction to general issues, Hanski helps us to learn how species and communities interact in fragmented landscapes, how evolution generates biodiversity, and how this biodiversity is maintained over time. Beginning each chapter on a particular island, Hanski dives into reflections on his own field studies before going on to pursue a variety of ecological questions, including: What is the biodiversity crisis? What are extinction thresholds and extinction debts? What can the biodiversity hypothesis tell us about rapidly increasing allergies, asthma, and other chronic inflammatory disorders?The world's largest island, Greenland, for instance, is the starting point for a journey into the benefits that humankind acquires from biodiversity, including the staggering biodiversity of microbes in the ecosystems that are closest to us the ecosystems in our guts, in our respiratory tracts, and under our skin. Conceptually oriented but grounded in an adventurous personal narrative, Messages from Islands is a landmark work that lifts the natural mysteries of islands from the sea, bringing to light the thrilling complexities and connections of ecosystems worldwide.

From a small island in the Baltic Sea to the large tropical islands of Borneo and Madagascar, Messages from Islands is a global tour of these natural, water-bound laboratories. In this career-spanning work, Ilkka Hanski draws upon the many islands on which he has performed fieldwork to convey key themes in ecology. By exploring the islands' biodiversity as an introduction to general issues, Hanski helps us to learn how species and communities interact in fragmented landscapes, how evolution generates biodiversity, and how this biodiversity is maintained over time. Beginning each chapter on a particular island, Hanski dives into reflections on his own field studies before going on to pursue a variety of ecological questions, including: What is the biodiversity crisis? What are extinction thresholds and extinction debts? What can the biodiversity hypothesis tell us about rapidly increasing allergies, asthma, and other chronic inflammatory disorders?The world's largest island, Greenland, for instance, is the starting point for a journey into the benefits that humankind acquires from biodiversity, including the staggering biodiversity of microbes in the ecosystems that are closest to us the ecosystems in our guts, in our respiratory tracts, and under our skin. Conceptually oriented but grounded in an adventurous personal narrative, Messages from Islands is a landmark work that lifts the natural mysteries of islands from the sea, bringing to light the thrilling complexities and connections of ecosystems worldwide.

From a small island in the Baltic Sea to the large tropical islands of Borneo and Madagascar, Messages from Islands is a global tour of these natural, water-bound laboratories. In this career-spanning work, Ilkka Hanski draws upon the many islands on which he performed fieldwork to convey key themes in ecology. By exploring the islands’ biodiversity as an introduction to general issues, Hanski helps us to learn how species and communities interact in fragmented landscapes, how evolution generates biodiversity, and how this biodiversity is maintained over time. Beginning each chapter on a particular island, Hanski dives into reflections on his own field studies before going on to pursue a variety of ecological questions, including: What is the biodiversity crisis? What are extinction thresholds and extinction debts? What can the biodiversity hypothesis tell us about rapidly increasing allergies, asthma, and other chronic inflammatory disorders? The world’s largest island, Greenland, for instance, is the starting point for a journey into the benefits that humankind acquires from biodiversity, including the staggering biodiversity of microbes in the ecosystems that are closest to us—the ecosystems in our guts, in our respiratory tracts, and under our skin. Conceptually oriented but grounded in an adventurous personal narrative, Messages from Islands is a landmark work that lifts the natural mysteries of islands from the sea, bringing to light the thrilling complexities and connections of ecosystems worldwide.

In many ecosystems dung beetles play a crucial role--both ecologically and economically--in the decomposition of large herbivore dung. Their activities provide scientists with an excellent opportunity to explore biological community dynamics. This collection of essays offers a concise account of the population and community ecology of dung beetles worldwide, with an emphasis on comparisons between arctic, temperate, and tropical species assemblages. Useful insights arise from relating the vast differences in species' life histories to their population and community-level consequences. The authors also discuss changes in dung beetle faunas due to human-caused habitat alteration and examine the possible effects of introducing dung beetles to cattle-breeding areas that lack efficient native species. "With the expansion of cattle breeding areas, the ecology of dung beetles is a subject of great economic concern as well as one of intense theoretical interest. This excellent book represents an up-to-date ecological study covering important aspects of the dung beetle never before presented."--Gonzalo Halffter, Instituto de Ecologia, Mexico City Originally published in 1991.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

In many ecosystems dung beetles play a crucial role--both ecologically and economically--in the decomposition of large herbivore dung. Their activities provide scientists with an excellent opportunity to explore biological community dynamics. This collection of essays offers a concise account of the population and community ecology of dung beetles worldwide, with an emphasis on comparisons between arctic, temperate, and tropical species assemblages. Useful insights arise from relating the vast differences in species' life histories to their population and community-level consequences. The authors also discuss changes in dung beetle faunas due to human-caused habitat alteration and examine the possible effects of introducing dung beetles to cattle-breeding areas that lack efficient native species. "With the expansion of cattle breeding areas, the ecology of dung beetles is a subject of great economic concern as well as one of intense theoretical interest. This excellent book represents an up-to-date ecological study covering important aspects of the dung beetle never before presented."--Gonzalo Halffter, Instituto de Ecologia, Mexico City Originally published in 1991.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

In many ecosystems dung beetles play a crucial role--both ecologically and economically--in the decomposition of large herbivore dung. Their activities provide scientists with an excellent opportunity to explore biological community dynamics. This collection of essays offers a concise account of the population and community ecology of dung beetles worldwide, with an emphasis on comparisons between arctic, temperate, and tropical species assemblages. Useful insights arise from relating the vast differences in species' life histories to their population and community-level consequences. The authors also discuss changes in dung beetle faunas due to human-caused habitat alteration and examine the possible effects of introducing dung beetles to cattle-breeding areas that lack efficient native species. "e;With the expansion of cattle breeding areas, the ecology of dung beetles is a subject of great economic concern as well as one of intense theoretical interest. This excellent book represents an up-to-date ecological study covering important aspects of the dung beetle never before presented."e;--Gonzalo Halffter, Instituto de Ecologia, Mexico CityOriginally published in 1991.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Elämän valtava kirjo on planeettamme hämmästyttävimpiä piirteitä. Eliölajeja on syntynyt ja sammunut vuosimiljoonien saatossa, mutta evoluutiota tapahtuu edelleen, aivan silmiemme edessä. Kun ympäristöolot muuttuvat, lajit voivat joko sopeutua uusiin olosuhteisiin, etsiytyä sopivaan ympäristöön tai kadota.Akateemikko Ilkka Hanskin tutkimukset kuudelta saarelta ympäri maailmaa - Borneon sademetsistä piskuiselle Haminanluodolle - auttavat ymmärtämään, mitä luonnon monimuotoisuus on ja miten se on kehittynyt. Lähes puolen vuosisadan aikana kertyneet havainnot kertovat myös ennennäkemättömän nopeista muutoksista, jotka ovat ihmisen aiheuttamia. Miten eri eliölajit reagoivat ilmaston lämpenemiseen? Mitä tarkoittaa luonnon globalisaatio? Mitä ovat vieraslajit, ja miksi ne uhkaavat monimuotoisuutta? Miten kaikki tämä vaikuttaa ihmiseen?Tutkimusmatkoja saarille on maailmanlaajuisesti arvostetun ekologin mukaansatempaava kertomus elämäntyöstään. Samalla se on vaikuttava puheenvuoro luonnon monimuotoisuuden vaalimisen puolesta.

Elinympäristöjen häviäminen ja pirstoutuminen on tärkein syy lajien uhanalaistumiseen ja luonnon monimuotoisuuden häviämiseen niin Suomessa kuin muuallakin maailmassa. Kutistuva maailma kertoo elinympäristöjen häviämisen seurauksista yksilöille, eliökannoille ja lajeille. Elinympäristöjen häviäminen muuttaa lajien elinoloja ja lisää niiden sukupuuttoriskiä. Myös elinympäristöjen pirstoutuminen pieniksi toisistaan erillisiksi laikuiksi on lajeille uhka, koska pienet ja eristyneet populaatiot häviävät helposti monestakin syystä. Väestönkasvu ja valtavasti lisääntynyt luonnonvarojen käyttö uhkaavat aiheuttaa maailmanlaajuisen massasukupuuton. Suuri osa kirjan esimerkeistä tulee Suomen metsistä, joissa lähes viidesosa eliölajeista on uhanalaisia tai silmälläpidettäviä. Tämä johtuu siitä, että luonnontilaisten ja luonnontilaisen kaltaisten metsien osuus on kutistunut murto-osaan niiden alkuperäisestä pinta-alasta. Teoksen näkökulma on populaatioekologinen, ja aihetta lähestytään havainnollisesti tarkastelemalla paikallisten kantojen muutoksia ja niiden vaikutuksia lajin populaatioihin laajemminkin. Mitä ovat sukupuuttokynnys, sukupuuttovelka ja ekologinen loukku? Minkälaisia evolutiivisia vaikutuksia elinympäristöjen häviämisellä on? Kirja on tarkoitettu kaikille, jotka haluavat perehtyä pintaa syvemmältä elinympäristöjen häviämisen ja pirstoutumisen populaatioekologisiin seurauksiin. Kirja sopii myös ekologian ja suojelubiologian opetuksen tueksi yliopistoon, ammattikorkeakouluun ja lukioon.

Elämän valtava kirjo on planeettamme hämmästyttävimpiä piirteitä. Eliölajeja on syntynyt ja sammunut vuosimiljoonien saatossa, mutta evoluutiota tapahtuu edelleen, aivan silmiemme edessä. Kun ympäristöolot muuttuvat, lajit voivat joko sopeutua uusiin olosuhteisiin, etsiytyä sopivaan ympäristöön tai kadota. Akateemikko Ilkka Hanskin (1953-2016) tutkimukset kuudelta saarelta ympäri maailmaa - Borneon sademetsistä piskuiselle Haminanluodolle - auttavat ymmärtämään, mitä luonnon monimuotoisuus on ja miten se on kehittynyt. Lähes puolen vuosisadan aikana kertyneet havainnot kertovat myös ennennäkemättömän nopeista muutoksista, jotka ovat ihmisen aiheuttamia. Miten eri eliölajit reagoivat ilmaston lämpenemiseen? Mitä tarkoittaa luonnon globalisaatio? Mitä ovat vieraslajit, ja miksi ne uhkaavat monimuotoisuutta? Miten kaikki tämä vaikuttaa ihmiseen? Tutkimusmatkoja saarille on maailmanlaajuisesti arvostetun ekologin mukaansatempaava kertomus elämäntyöstään. Samalla se on vaikuttava puheenvuoro luonnon monimuotoisuuden vaalimisen puolesta.