New article: Thorea okadae

Our new article, which elucidates the photosynthetic response of the freshwater red alga Thorea okadae to environmental gradients of temperature, irradiance, desiccation, and salinity, was recently published in the Journal of Applied Phycology. Thorea okadae is a freshwater red alga distributed in the southern and western parts of Japan and is listed as an endangered species by the Ministry of the Environment of Japan. We believe that the insights presented in the article will contribute to a better understanding of the conservation of this species.

Terada, Makino, & Nishihara 2025. The photosynthetic response of the freshwater red alga Thorea okadae to environmental gradients of temperature, irradiance, desiccation, and salinity: Adaptations to its stream habitat. Journal of Applied Phycology, 37. https://doi.org/10.1007/s10811-025-03528-7

https://link.springer.com/article/10.1007/s10811-025-03528-7 

Thorea okadae

Sargassum horneri at Nagashima Island, Kagoshima

Introducing amazing photos of the fucoid forest, Sargassum hornei, found only during this period at Nagashima Island, Kagoshima, Japan. The photos were taken during the April Nagashima survey.

 

論文：鹿児島湾のアマモ場が2006年と比べて1/10に減少

近年，日本各地で藻場の衰退や消失が報告されています。私たちの研究室が2021年に鹿児島湾の海草藻場（アマモ場）を広域調査した結果，2006年と比べて約10分の1に減少していることが明らかになりました。

新北成実，寺田竜太．2023．鹿児島湾のアマモ場：2021年の分布状況と長期的な衰退．

日本水産学会誌

DOI: 10.2331/suisan.23-00020

https://doi.org/10.2331/suisan.23-00020

無料でダウンロードできます。

 

鹿児島湾のアマモ場（鹿児島市）

 

論文：アマモZostera marinaの分布南限個体群の光合成における温度や光の影響

鹿児島湾に生育する海産顕花植物アマモZostera marinaの分布南限個体群の光合成における温度や光の影響に関する論文が刊行されました。

 

島田菜摘，畳谷伊織，Gregory N. Nishihara，寺田竜太．2022．

鹿児島産一年生アマモZostera marina実生の光合成に対する温度や光の影響．

日本水産学会誌88 (6): 早期公開（2022年11月11日）

DOI: 10.2331/suisan.22-00011

 

Natsumi Shimada, Iori Tatamidai, Gregory N. Nishihara, Ryuta Terada. 2022.

The effect of temperature and light on the photosynthesis of annual Zostera marina seedlings from Kagoshima, Japan.

Nippon Suisan Gakkaishi 88 (6):

DOI: 10.2331/suisan.22-00011

 

https://www.jstage.jst.go.jp/article/suisan/advpub/0/advpub_22-00011/_article/-char/ja

 

 

New article: The effects of desiccation and salinity gradients in the PSII photochemical efficiency of an intertidal brown alga, Sargassum fusiforme from Kagoshima, Japan

 

Please check out our new article featuring the effects of desiccation and salinity gradients on the photochemical efficiency of an edible brown alga, Sargassum fusiforme from Kagoshima, Japan

 

Yukiko Yonemori, Shogo Kokubu, Gregory N. Nishihara, Hikaru Endo, Ryuta Terada 2022. The effects of desiccation and salinity gradients in the PSII photochemical efficiency of an intertidal brown alga, Sargassum fusiforme from Kagoshima, Japan. Phycological Research DOI: 10.1111/PRE.12491

 

https://onlinelibrary.wiley.com/doi/full/10.1111/pre.12491

 

Congratulation to Yukiko and great co-authors!

 

Sargassum fusiforme

 

Sargassum horneri and Ecklonia aridoca in Nagashima island

Introducing some nature photos of seaweed communities from the field survey in Nagashima Island, Kagoshima. Spring has sprung! 

Sargassum horneri 

Ecklonia aridoca

Sargassum horneri

Sargassum horneri

Ecklonia aridoca

 

新刊：鹿児島県の維管束植物分布図集

鹿児島大学の鈴木英治先生が中心となり，鹿児島県の維管束植物3914分類群の県内分布図集が鹿児島大学総合研究博物館より刊行されました。海藻研の寺田は，海産顕花植物の分布をまとめました。

 

鹿児島県の維管束植物分布図集

 

冊子体もありますが，PDF版は以下のリンクより無償でダウンロード可能です。鹿児島県全県版と奄美群島版の2冊同時刊行です。全県版は500ページを超える大著です。

鹿児島県の維管束植物分布図集　全県版

鈴木英治, 丸野勝敏, 田金秀一郎, 寺田竜太, 久保紘史郎, 平城達哉, 大西亘

鹿児島大学総合研究博物館　2022年2月

https://www.museum.kagoshima-u.ac.jp/publications/plants/map_Kagoshima_all.pdf

（20MB）

鹿児島県の維管束植物分布図集　奄美群島版

鈴木英治, 丸野勝敏, 田金秀一郎, 寺田竜太, 久保紘史郎, 平城達哉, 大西亘

鹿児島大学総合研究博物館　2022年2月 

https://www.museum.kagoshima-u.ac.jp/publications/plants/map_Amami-gunto_all.pdf

（8MB）

新しい論文：イソモクとコナフキモクの生態

 新しい論文が出ました。鹿児島湾で藻場を形成するイソモクとコナフキモクについて，季節的な消長の特性をまとめたものです。

倉堀宇弘，島袋寛盛，猪狩忠光，寺田竜太2022

鹿児島湾産褐藻ホンダワラ属藻類2種，イソモクとコナフキモクの季節的消長と生育環境．

日本水産学会誌 DOI: 10.2331/suisan.21-00028

（早期公開：2021年11月26日）

 

Takahiro Kurahori, Hiromori Shimabukuro, Ryuta Terada 2022. Phenology and environmental characteristics of two species of Sargassum (Fucales), S. hemiphyllum and S. glaucescens from Kagoshima Bay, Japan.

Nippon Suisan Gakkaishi

 

DOI: 10.2331/suisan.21-00028 (Online: 26 November 2021)

 

https://www.jstage.jst.go.jp/article/suisan/advpub/0/advpub_21-00028/_article/-char/ja

 

New article: Phycocalidia tanegashimensis 2

Our 7th article in 2021 was out~ 

Gangping Xu, Ryuta Terada, Yuki Watanabe, Gregory N. Nishihara 2021. The occurrence of Phycocalidia tanegashimensis (Bangiaceae) in the splash zone may be related to the tolerance of photochemical efficiency to temperature, irradiance, desiccation, and salinity

Journal of Applied Phycology

DOI: 10.1007/s10811-021-02498-w

Phycocalidia tanegashimensis

https://link.springer.com/article/10.1007/s10811-021-02498-w

New article: Neopyropia yezoensis f. narawaensis

Our new article was out from Algal Research (IF: 4.008).

Ryuta Terada, Gregory N. Nishihara, Kaname Arimura, Yuki Watanabe, Takayuki Mine, Tarou Morikawa 2021. Photosynthetic response of a cultivated red alga, Neopyropia yezoensis f. narawaensis (= Pyropia yezoensis f. narawaensis; Bangiales, Rhodophyta) to dehydration stress differs with between two heteromorphic life-history stages.

Algal Research 55: 102262 (1 April 2021)

DOI: 10.1016/j.algal.2021.102262

 

Neopyropia yezoensis f. narawaensis

https://www.sciencedirect.com/.../pii/S2211926421000813

New article: Caulerpa lentillifera

 Introducing our new article featuring the photosynthetic performance of a green alga Caulerpa lentillifera in response to three different stressors, temperature, irradiance, and desiccation.

Terada, Takaesu, Borlongan, Nishihara 2021. The photosynthetic performance of a cultivated Japanese green alga Caulerpa lentillifera in response to three different stressors, temperature, irradiance, and desiccation.

Journal of Applied Phycology 33:

DOI: 10.1007/s10811-021-02439-7

 

Caulerpa lentillifera

https://link.springer.com/article/10.1007/s10811-021-02439-7

A new species: Gracilariopsis mageshimensis from Mageshima, Kagoshima, Japan

 Please take a look at our new article featuring a new species of Gracilariopsis, Gp. mageshimensis from deep subtidal waters of Kagoshima, Japan.

Masahiro Suzuki, Ryuta Terada 2021. A new flattened species of Gracilariopsis (Gracilariales, Rhodophyta) from Japan.

Phycologia 60:

DOI: 10.1080/00318884.2021.1880755

 

Gracilariopsis mageshimensis

https://www.tandfonline.com/.../10.../00318884.2021.1880755

New article: Phycocalidia tanegashimensis

 Please take a look at our new article featuring a subtropical red alga, Phycocalidia tanegashimensis (Pyropia tanegashimensis).

Xu, Terada, Watanabe, Nishihara 2021.

Temperature characteristics on the growth and photosynthesis of a red alga, Phycocalidia tanegashimensis (Pyropia tanegashimensis, Bangiales) reveal adaptation to subtropical environments due to year-round occurrence of the macroscopic gametophyte. 

 

Journal of Applied Phycology 33:

DOI: 10.1007/s10811-021-02426-y

https://link.springer.com/article/10.1007/s10811-021-02426-y

 

Phycocalidia tanegashimensis

 

鹿児島県北西部の長島で調査を行いました。

鹿児島県の北西部に位置する長島町で，藻場の長期変化をモニタリングする調査を行いました。この調査は毎年この時期に実施しており，環境省の「モニタリングサイト1000沿岸域調査」として，調査結果が後日公開される予定です。

Namalionopsis tortuosa（オキチモズクの調査）

A survey of freshwater red algae including Nemalionopsis tortuosa was carried out. This species can be found in shaded areas of irrigation canals; however, confirmed habitat is limited, and only around twenty sites have been recorded from Kyushu, Shikoku and Okinawa Islands. Presently, this species is registered as an endangered species by the Japanese Ministry of Environment.

Nemalionopsis tortuosa

Characteristic ecology and photosynthetic performance of this species were recently reported from our group. 

http://onlinelibrary.wiley.com/doi/10.1111/pre.12049/abstract

Fujimoto et al. 2014. Phenology, irradiance and temperature characteristics of a freshwater red alga, Nemalionopsis tortuosa (Thoreales), from Kagoshima, southern Japan. Phycological Research 62: 77-85

Volcanic rocky shore

Lab members including two newcomers conducted the field survey at the volcanic rocky shore.

カギイバラノリ Hypnea japonica

Leptofauchea leptophylla（桜島のトゲナシマダラ）

Introducing a rare species of the red alga, Leptofauchea leptophylla that can only be found in this spring period of Kagoshima Bay.
This is quite tiny but beautiful alga that can be found on the rocks at more than 10m deep.

Leptofauchea leptophylla

Leptofauchea leptophylla (Segawa) Suzuki, Nozaki, Terada, Kitayama, Hashimoto et Yoshizaki

Pyropia tenera survey in Kumamoto（熊本でアサクサノリの調査）

Field survey of an endangered alga, Pyropia tenera, was conducted at a site in Kumamoto Prefecture.

Pyropia tenera　アサクサノリ

This species is known as an edible alga in Japan. However, due to the loss of the habitat, extinction of the natural population has also been seriously concerned.
Characteristic photobiology of this species was recently reported by our team.

http://onlinelibrary.wiley.com/d…/10.1111/pre.12053/abstract

Porphyra survey at Minami-Satsuma City（坊津で坊ノリの調査）

Field survey of Pyropia (= Porphyra) was conducted at a rocky shore in Minami-Satsuma City, Kagoshima Prefecture. Fortunately, we found a big Pyropia population on the rocks in the upper intertidal zone facing the East China Sea. Indeed, rocks were mostly covered by the alga. 
薩摩半島南西部にある南さつま市坊津でアマノリ類の調査を行いました。この種は地元で「坊ノリ」と呼ばれており，波あたりの激しい沖合の瀬に生育しています。数年ぶりに来ました。

This alga, known as Bo-Nori for local people, was formerly harvested by fishermen in Winter, and was indispensable to their dietary culture.

Sargassum fusiforme in Kagoshima（鹿児島のヒジキ）

Introducing an underwater view of Sargassum fusiforme population in Sakurajima, Kagoshima, Japan. This is the actual current status before the harvest. This species, known as Hijiki In Japanese, will be harvested by fishermen in April and May.

Sargassum fusiforme ヒジキ

Its characteristic ecophisiology will be reported from the following article (coming soon):

Kokubu, S., Nishihara, G. N., Watanabe, Y., Tsuchiya, Y., Amano, Y., Terada, R. 2015. The effect of irradiance and temperature on the photosynthesis of a native brown alga, Sargassum fusiforme (Fucales) from Kagoshima, Japan. Phycologia 54: (in press)