Kuzivisa iyo 2024 Boyd Lyon Scholar

Gore rega rega, iyo Boyd Lyon Gungwa Turtle Fund inotambira mudzidzi wemarine biology ane tsvakiridzo yakanangana nekamba dzegungwa. Muhwina wegore rino ndiJaime Restrepo.

Verenga pfupiso yetsvakiridzo yake pazasi:

kumashure

Kamba dzomugungwa dzinogara mumhoteredzo yezvipenyu yakasiyana-siyana muupenyu hwadzo hwose; vanowanzo gara munzvimbo dzakatsanangurwa dzekudya uye vanotama semi-pagore kuenda kumahombekombe ekugara kana vangotanga kuita basa rekubereka (Shimada et al. 2020). Kuzivikanwa kwenzvimbo dzakasiyana dzekugara dzinoshandiswa nekamba dzemugungwa uye kubatana pakati padzo kwakakosha kuisa pamberi pekuchengetedzwa kwenzvimbo dzinodiwa kuti vaone kuti vanozadzisa mabasa avo ezvakatipoteredza (Troëng et al. 2005, Kofi et al. 2020). Mhuka dzinofamba zvakanyanya dzakaita sekamba dzemugungwa, zvinoenderana nenzvimbo dzakakosha kuti dzibudirire. Saka, nzira dzekuchengetedza kuchengetedza mhuka idzi dzichangobudirira sechimiro chechinhu chisina kusimba chinoyambuka nzira yekutama. Satellite telemetry yakafambisa kunzwisiswa kwenzvimbo yezvisikwa uye mafambiro ekufamba kwekamba dzemugungwa uye yakapa nzwisiso mubiology yavo, kushandiswa kwenzvimbo uye kuchengetedza (Wallace et al. 2010). Munguva yakapfuura, kuronda tururu kwaivhenekera mikoto inotama uye kwakabatsira kutsvaga nzvimbo dzekutsvagira chikafu (Vander Zanden et al. 2015). Kunyangwe nekukosha kukuru kwesetiraiti telemetry yekudzidza mafambiro emarudzi, chimwe chikuru chinodzosera mutengo wakakwirisa wevanotapurirana, izvo zvinowanzo tungamira kune mashoma saizi saizi. Kugadzirisa dambudziko iri, yakagadzikana isotope ongororo (SIA) yezvinhu zvakajairika zvinowanikwa mumasikirwo yanga iri chishandiso chinobatsira kuona nzvimbo dzakabatana nekufamba kwemhuka munzvimbo dzemugungwa. Kufamba-famba kunogona kuteverwa zvichibva pane zvepakati gradients mune isotope kukosha kwevagadziri vekutanga (Vander Zanden et al. 2015). Kugoverwa kwemaisotopi mune organic uye inorganic zvinhu zvinogona kufanotaurwa zvichitsanangura mamiriro ezvakatipoteredza pachiyero chepakati uye chenguva, kugadzira isotopic landscapes kana isoscapes. Aya mabhiikhemikari mamaki anokonzereswa nenharaunda kuburikidza nekutamisa trophic, saka mhuka dzese dziri munzvimbo yakatarwa dzinonyorwa pasina kubatwa nekumaka (McMahon et al. 2013). Hunhu uhu hunoita kuti hunyanzvi hweSIA hunyatsoshanda uye huchidhura, huchibvumira kuwana saizi yakakura yemuenzaniso, uye kuwedzera kumiririrwa kwevanhu vakadzidza. Saka, kuita SIA nekuenzanisa turtles nesting kunogona kupa mukana wekuongorora kushandiswa kwezviwanikwa munzvimbo dzekudyara nguva isati yasvika (Witteveen 2009). Pamusoro pezvo, kuenzanisa kwekufungidzira kweisoscape kwakavakirwa paSIA kubva kumasamples akaunganidzwa munzvimbo yese yefundo, nedata rekucherekedza rakawanikwa kubva kune yakapfuura maki-recapture uye setiraiti telemetry zvidzidzo, inogona kushandiswa kuona kubatanidzwa kwenzvimbo mubiogeochemical, uye ecological system. Iyi nzira saka yakanyatsokodzera kudzidza kwezvipenyu zvingave zvisipo kune vaongorori kwenguva yakakosha yehupenyu hwavo (McMahon et al. 2013). Tortuguero National Park (TNP), kumhenderekedzo yeCaribbean yekuchamhembe kweCosta Rica, ndiyo hombe huru yegungwa regirinhi regungwa muGungwa reCaribbean (Seminoff et al. 2015; Restrepo et al. 2023). Tag yekudzorera data kubva kune dzimwe nyika recaptures yakaratidza post-nesting kupararira maitiro kubva kuvanhu ava muCosta Rica yose, uye 19 dzimwe nyika munharaunda (Troëng et al. 2005). Nhoroondo, zviitiko zvekutsvagisa kuTortuguero zvakanangidzirwa kuchamhembe kwe8 km yemahombekombe (Carr et al. 1978). Pakati pa2000 na2002, gumi returtles tagged akaburitswa muchikamu ichi chemahombekombe egungwa aifamba kuchamhembe achienda kunzvimbo dzekudya neritic kubva kuNicaragua, Honduras, neBelize (Troëng et al. 2005). Kunyange zvakadaro, ruzivo rwekudzoreredza kweflipper-tag rwakapa humbowo hwakajeka hwevakadzi vachifamba munzira dzakareba dzekutama, dzimwe nzira hadzisati dzaonekwa mukufamba kweturtles tagged satellite (Troëng et al. 2005). Makiromita masere enzvimbo yakatarisana nezvidzidzo zvakapfuura anogona kunge akarerekera kune imwe nhanho yenzira dzekutama dzakacherechedzwa, kuwedzeredza kukosha kwenzira dzekuchamhembe dzekutama uye nzvimbo dzekudya. Chinangwa chechidzidzo ichi ndechekuongorora kufambiswa kwenzvimbo dzeturtuguero dzegirinhi dzekamba, nekuongorora kabhoni (δ 13C) uye nitrogen (δ 15N) isotopic kukosha kwenzvimbo dzekudyara dzekudya mhiri kweGungwa reCaribbean.

Zviitiko Zvakatarisirwa

Nekuda kwekuedza kwedu kwesampling takatounganidza anopfuura mazana masere ematishu samples kubva kugirinhi turtles. Mazhinji eawa anobva kuTortuguero, ane miunganidzo yekuunganidza munzvimbo dzekudya dzinopedzwa gore rese. Zvichienderana neSIA kubva kumasample akaunganidzwa mudunhu rese, tichagadzira isoscape modhi yegirinhi turtles muCaribbean, tichiratidza nzvimbo dzakasiyana dzehukoshi hwe δ800C uye δ13N munzvimbo dzemugungwa (McMahon et al. 15; Vander Zanden et al. 2013) . Iyi modhi yaizoshandiswa kuongorora inoenderana nzvimbo dzekuumba dzegirinhi turtles dzinogara kuTortuguero, zvichibva pane yavo yega SIA.