Do desiccation tolerances control the vertical distribution of intertidal seagrasses?

Community-level carbon flux variability over a tidal cycle in Zostera marina and Z. noltii beds

“…NCP decreased immediately at the beginning of emersion and did not vary throughout the air exposure period. Although the limitation of metabolism by desiccation has been described at the scale of both the plant (Björk et al 1999) and the leaf (Shafer et al 2007), the present study did not highlight any desiccation effect at the community scale. An important superficial cover of Zostera spp.…”

“…Jiménez et al 1987) during immersion. Desiccation tolerance has been studied in both species at the scale of leaves using pulse-amplitude modulation (PAM) methods (Shafer et al 2007) or CO 2 gas analysers (Leuschner & Rees 1993, Leuschner et al 1998. Over the course of a tidal cycle, Silva et al (2005) measured a lower photosynthetic response during immersion than emersion using PAM methods and explained this result by the rapid air−water CO 2 diffusion in the thin water film on leaves exposed to the air.…”

Is Halophila major (Zoll.) Miquel a big H. ovalis (R. Brown) J.D. Hooker? An evaluation based on age, morphology, and ITS sequence

“…Hooker is the most common species in this genus found in the IndoPacific, the temperate North Pacific, the temperate Southern Oceans, and has recently been observed in the Tropical Atlantic Ocean 4 . It is well known for its variable morphology and adaptability to various environmental conditions [5][6][7][8] . Although H. ovalis is widely distributed, it has been represented as a single collective species 1,9 .…”

Seasonal Changes in the Carbon and Nitrogen Contents of Zostera marina Populations in the Intertidal and Subtidal Zones of the Seomjin Estuary, Korea

“…해초는 대부분 조하대에서 생육하고 재 생산이 이루어지지만, 일부 종들은 조간대에서 생육하기도 한 다 (Leuschner and Rees, 1993;Koch, 2001;Lee et al, 2006). 항상 물에 잠겨있는 조하대와는 대조적으로 조간대 하부 거머 리말은 매일 2회 물이 빠져나가는 썰물 시간 동안 공기에 노출 되어 있으며, 건조의 위험, 극한 온도와 자외선 광에 의한 손 상이 일어날 수 있다 (Leuschner and Rees, 1993;Hemminga et al, 1994;Leuschner et al, 1998;Shafer et al, 2007 (Leuschner and Rees, 1993;Leuschner et al, 1998;Shafer et al, 2007). 본 연구는 섬진강 하구유역의 조간대와 조하대에 생육하는 거머리말의 계절에 따른 탄소와 질소 성분 변화를 비교하고자 하였다.…”