基調シンポジウム


基調シンポジウムA

[SpA] Sex in the Community: Reproductive Interference and its Implications
Sunday, 11 October 9:00–12:00 room A (Center for Academic and Cultural Exchange)
Organizers: Suzuki Noriyuki (Rissho Univ.) & Daisuke Kyogoku (Kyoto Univ.)
Language: English

Reproductive interference has received attention in recent years as an important interspecific interaction that can cause species exclusion, niche partitioning, and character displacement. Due to its potential generality across animal and plant taxa, it should be further linked with diverse phenomena in population ecology and evolutionary biology, such as eco-evolutionary dynamics and adaptive radiation. Here, in this symposium, young ecologists introduce the recent advances on the cause and consequence of reproductive interference. Notably, we arranged commentators to each speaker to provide the renewed attention to this area and to enhance discussion. By doing so, we would like to clarify the future perspective on reproductive interference and its related areas.

繁殖干渉は、競争排除や形質置換といった生態的・進化的に重要な帰結をもたらす種間相互作用として近年注目されています。しかし、動植物全般にわたる繁殖干渉の潜在的な普遍性を考えると、個体群生態学や進化生物学の多様なトピックにもっと関連づけられると期待されます。そこで本シンポジウムでは、繁殖干渉の原因と結果についての最近の研究成果について紹介します。特徴的な点として、各講演者にコメンテーターをひとりずつ配置し、客観的な目線から繁殖干渉の発展性について議論してもらいます。こうすることで、より広範囲のトピックとのつながりを明らかにしていきたいと考えています。


[SpA-1] Asymmetry in species recognition and reproductive interactions in a hybridizing avian species pair
David Wheatcroft (Uppsala Univ)

[SpA-2] The evolutionary ecology of niche separation in Leptidea butterflies
Magne Friberg (Uppsala Univ)

[SpA-3] Reproductive character displacement by the evolution of female mate choice
Ryo Yamaguchi (Kyushu Univ)

[SpA-4] The promise of eco-evolutionary perspective: evolutionary rescue associated with reproductive character displacement
Daisuke Kyogoku (Kyoto Univ)

Commentators:
Toshitaka Suzuki (SOKENDAI)    
Suzuki Noriyuki (Rissho Univ) 
Kotaro Kagawa (Univ of Tokyo)
Minoru Kasada (Univ of Tokyo)   



基調シンポジウムB

[SpB] Biogeography: spatial partitioning of diversifying lineages
Monday, 12 October 9:00–12:00 room A (Center for Academic and Cultural Exchange)
Organizers: Takayoshi Nishida (Univ.of Shiga Pref.)
企画者:西田隆義(滋賀県大)
Language: English

Theory of Island Biogeography (TIB) by MacArthur and Wilson (1967) was a starting point of modern ecological biogeography. Until their seminal study, biogeography had been descriptive studies largely based on phylogeny, dispersal history and geographic barriers. The largest contribution of TIB was a proposal of a general explanatory framework for quantitative studies of biogeography in general. It should be noted, however, r-K paradigm, the major assumptions of TIB, had gradually lost its heuristic value both theoretically and empirically during 1980s to account for colonization success and extinction. As a result, the status quo of TIB is just a descriptive model, in which balance of the immigration and extinction rate determine the species equilibrium. In this symposium we aim to re-establish ecological biogeography by incorporating key ecological interactions to understand from a small pattern between closely related species or populations to global biodiversity patterns and, hopefully, we would provide simple and testable predictions for future study of biogeography.

マッカーサー・ウィルソン(1967)の「島の生物地理」は現代の生態生物地理の出発点となった。彼らのこの強い影響力をもった研究以前には、生物地理とは系統、分散の歴史、地理的な障壁に基づく記載的な研究だった。島の生物地理の最大の貢献は、生物地理の定量的な研究一般に対して普遍的な説明の枠組みを提供したことだ。しかし、島の生物地理の主要な前提であるr-Kパラダイムは、1980年代を通じて徐々に、理論的にも実証的にも移入の成功と絶滅を説明する上で、その発見的な価値を低下させていった。その結果、島の生物地理は、移入率と絶滅率のバランスで種の平衡が決まるという単なる記載的なモデルになっているのが現状である。このシンポジウムでは、鍵となる生態的相互作用を取り入れることで生態生物地理の再構築し、それによって近縁種間にみられる小スケールのパタンから地球規模の生物多様性のパタンまで理解し、さらに将来の研究のためにシンプルでテスト可能な予測を提供したい。


[SpB-1] Incorporating key ecological interactions into biogeography: a simple rule accounting for “primary effect”
Takayoshi Nishida, Takehiro Yoshizaki & Koh-ichi Takakura (University of Shiga Pref.) 

[SpB-2] Island biogeography of invasive vs. native plants
Koh-ichi Takakura (University of Shiga Pref.)

[SpB-3] Biogeographic variation in reproductive traits and development of cryptic reproductive isolation between local populations in a grasshopper, Podisma sapporensis
Yoshikazu Sugano, Kaori Tuchiya-Suzuki, and ○Shin-ichi Akimoto (Hokkaido University)

[SpB-4] Studies of ant invasion should more seriously consider the explicit link to fundamental theories of ecology and evolution.
Kazuki Tsuji (University of the Ryukyus)

[SpB-5] Global patterns of diversity and diversification rate in ants
Evan Economo (Okinawa Institute of Science and Technology)


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