Takashi Asaeda, Md Harun Rashid
M.E. Äzim, M.A. Wahab, P. K. Biswas, T. Asaeda et al.
The present research investigated the optimum surface area of periphyton substrate in earthen ponds stocked with a pre-optimized density and ratio of the Indian major carps, catla (Catla catla), rohu (Labeo rohita) and kalbaush (Labeo calbasu) to support enhanced fish production. Four treatments in ...
Guligena Muhetaer, Takashi Asaeda, Senavirathna M. D. H. Jayasanka, Mahendra B. Baniya et al.
Light is an important factor that affects cyanobacterial growth and changes in light can influence their growth and physiology. However, an information gap exists regarding light-induced oxidative stress and the species-specific behavior of cyanobacteria under various light levels. This study was co...
Animesh Sarkar, Takashi Asaeda, Qingyue Wang, Md Harun Rashid
M.E. Äzim, Md Rahaman, M. Abdul Wahab, Takashi Asaeda et al.
A bioeconomic study of periphyton-based aquaculture in Bangladesh was carried out through comparison of on-farm and on-station trials. Five treatments, three on-farm and two on-station, each with four replications, were tried in a completely randomized design: on-farm control without substrate or fe...
Takashi Asaeda, Md Harun Rashid, Kohske Ohta
Abstract It was assumed that the symbiotic N fixation in a floodplain site is highly affected by flood disturbances. To test this hypothesis, we collected soil and plant samples from several quadrats of the midstream flood plain of a relatively steep urbanized river that was subject to a different m...
Animesh Sarkar, Takashi Asaeda, Qingyue Wang, Md Harun Rashid
Effects of arbuscular mycorrhizal fungi (AMF) on the growth, nutrient absorption, and inoculation effectiveness of AMF on pioneer plants Pharagmites japonica (C4) and Polygonum cuspidatum (C3) were evaluated by performing a pot experiment in a greenhouse at Saitama University, Japan. AMF spores were...
Mahfuza Parveen, Takashi Asaeda, Md Harun Rashid
Hydrogen sulfide (H2S) is a known phytotoxin for submerged macrophytes, which can affect plant species differentially and modify species composition in aquatic environments. To investigate the effects of H2S on three submerged macrophytes, Elodea nuttallii, Myriophyllum spicatum and Potamogeton cris...
Takashi Asaeda, Md Harun Rashid
Animesh Sarkar, Takashi Asaeda, Qingyue Wang, Yasuko Kaneko et al.
Arbuscular mycorrhizal (AM) fungi have the ability to promote growth of the associated plants by enhancing water and nutrient uptake. In the present study, we aimed to explore the performance of Miscanthus sacchariflorus under different soil zinc (Zn) levels in association with inoculated AM fungi. ...
Mahfuza Parveen, Takashi Asaeda, Md Harun Rashid
A hydroponic experiment was performed to investigate the stress responses and biochemical adaptations of four submerged macrophytes, Potamogeton crispus, Myriophyllum spicatum, Egeria densa, and Potamogeton oxyphyllus, to the combined exposure of hypoxia and hydrogen sulfide (H2S, provided by NaHS)....
Takashi Asaeda, Md Harun Rashid, Henegama Liyanage Kelum Sanjaya
Abstract It was assumed that sediment release from a reservoir would trigger forestation and change the spatial pattern of tree recruitment in the downstream. This study tested these hypotheses by observation on a downstream sandbar of the Kurobe River. Prior to sediment release, Elaeagnus umbellata...
Animesh Sarkar, Takashi Asaeda, Qingyue Wang, Yasuko Kaneko et al.
The effects of an arbuscular mycorrhizal fungi (AMF) association on the growth, survival capabilities, nutrients and lead (Pb) uptake of Miscanthus sacchariflorus under different Pb concentrations were studied in the form of pot cultures. The treatments comprised inoculation or non-inoculation of th...
Takashi Asaeda, Mizanur Rahman, Lekkala Vamsi-Krishna, Jonas Schoelynck et al.
Abstract Riparian vegetation is frequently exposed to abiotic stress, which generates reactive oxygen species (ROS) caused by strong differences in a river’s hydrological conditions. Among different ROS, hydrogen peroxide (H 2 O 2 ) is relatively steady and can be measured appropriately. Thus, the q...
Takashi Asaeda, Md Harun Rashid, Jonas Schoelynck
In recent years, an invasive macrophyte, Egeria densa , has overwhelmingly colonized some midstream reaches of Japanese rivers. This study was designed to determine how E. densa has been able to colonize these areas and to assess the environmental conditions that limit or even prevent colonization. ...
Mahfuza Parveen, Atsuko Miyagi, Maki Kawai‐Yamada, Md Harun Rashid et al.
Oxygen availability in water is considered one of the most important factors for growth and productivity in aquatic submerged macrophytes. In the present study, the growth, stress responses, and metabolic changes in Potamogeton anguillanus Koidz. (Potamogetonaceae) were assessed after a 21-day expos...
Takashi Asaeda, Md Harun Rashid, Xia Liping, Lekkala Vamsi-Krishna et al.
Abstract The feasible condition for submerged macrophyte growth is hard to understand as many environmental factors contribute to establishing macrophyte distribution with different intensities generating excess reactive oxygen species (ROS). Among various kinds of ROS, hydrogen peroxide (H 2 O 2 ) ...
Takashi Asaeda, Md Harun Rashid
In the floodplain of a regulated river with an intermittent flood disturbance, nutrient dynamics is mainly dependent on the successional stage of vegetation, types of flora and initial substrate conditions brought about by a previous large flood. In this study, we collected data on plant and substra...
Md Harun Rashid, Md. Nazim Uddin, Takashi Asaeda, Randall W. Robinson
The seasonal changes of non‐structural carbohydrates ( NSCs ), water‐soluble carbohydrates ( WSCs ) and starch concentrations were examined in Pueraria lobata throughout its life cycle in order to elucidate the potential points in the seasonal growth and phenological cycles for its improved control....
Takashi Asaeda, Md Harun Rashid
Abstract In a previous study, we found that Sparganium erectum , an emergent macrophyte, accumulates sediment inside the stand because of its phenological features. Because this species usually grows in a nutrient‐rich environment, we hypothesize that a high trophic level is maintained in the accumu...