I’ve been working in Hong Kong for 30 years and have spent most of this time trying to place tropical, monsoonal shores within the context of generally accepted patterns in intertidal ecology. Coming originally from a temperate background, my perceptions were changed arriving to the hot and barren shores that we find in Hong Kong during the hot season which contrast strongly with the vibrant life that we find in the cool winter season. The speed at which assemblages change, the high summer mortalities and then rapid winter recovery makes an incredibly dynamic system where species adopt a ‘live fast die young strategy’.
Trying to piece all these things together has proved challenging. Unlike in many temperate areas, the taxonomy of species in this region is poorly understood and even less is known of their ecologies. To try and document these patterns our group has spent a lot of time detailing the basic ecology of species in the region; much in collaboration with a great set of colleagues in Thailand, Taiwan, Vietnam, China and Malaysia. This information is so important when we try and interpret community patterns and yet seems to be out of fashion these days! From these studies we have focused on a few aspects, mostly around species behaviour and physiology, related to surviving in the extremes of a tropical intertidal zone. Inevitably, this work has mostly concentrated on rocky shore limpets and snails; but we have branched out to sandy shore crabs; mangrove snails and even vertebrates in the form of mudskippers at times……
Recently, studies have widened to consider how changing environmental conditions are affecting species responses over geographic ranges (working from Singapore to northern China) and currently to the survival strategies of high shore species, which are living in extreme harsh environments on tropical shores. As ever, these studies are revealing exciting findings and always challenging paradigms associated with temperate regions. Hopefully the insights we gain, as the world becomes a warmer place, will play an important role in how we can perhaps anticipate and manage future changes to species distributions, especially in understudied tropical areas.


Tommy Hui
Postdoctoral Fellow
(Update in 2025: Assistant Professor of Science Unit, Lingnan University)
Contact: hty13@connect.hku.hk
I am currently a postdoctoral fellow at the Tropical Intertidal Ecology group, SWIMS, HKU. I am interested in the behavioural ecology of intertidal animals, in particular how they acquire food and avoid physical stress in the highly variable and stressful tropical intertidal environment. Using a variety of modelling and experimental approaches, I am also interested in modelling animals’ behavioural patterns based on their decision-making processes to understand how they can survive and persist in the harsh intertidal environment.
Yi-Fei Gu
PhD Candidate (Graduated in 2025)
Contact: guyf0601@connect.hku.hk
I conducted my MSc project in collaboration with the TIDE group creating a web-based interactive marine GIS platform in Hong Kong. As a bio- & geo- informatician, I am familiar with several data-driven and progressive programming languages including R, Python, and JavaScript, as well as Git version control and Bash scripts in Linux environment. Currently, I am working in the group, and assisting to construct a web-based educational tool for promoting marine biodiversity in Hong Kong. I am planning to build up advanced data visualisation models to assist the studies in rocky shore biotic-abiotic interactions.


Jackson Lau
PhD Candidate
Contact: jacksonlau620@gmail.com
My project studies rocky shore assemblages in Hong Kong, with a focus on "how different biotic and abiotic forces shape what we see on the shore". The ECF team and I have been collecting rocky shore community data around Hong Kong, and I will use these data for my thesis. Apart from the ECF project, I'm also collecting monthly time-series data on assemblage and physical environment and aim to apply time-series analyses here.
I conducted my final year research project under the supervision of the TIDE group in 2020, investigating the “standing” behaviour of hermit crabs in which they maintain a suboptimal body temperature to avoid heat stress in the highly variable tropical intertidal environment. I am currently working in the group to assist the newly established ECF project on Hong Kong rocky shore biodiversity. I am obsessed with the behavioural ecology of intertidal organisms, in particulate predator-prey interaction and resource competition, which determine the distribution of all species and form astonishing zones on the shore.

