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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 39 8398 8060 19 19 295 5524

Chee Kong Yap publications per year

The chart shows the history of publications by Chee Kong Yap between 2002 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Chee Kong Yap published across 24 years, from 2002 to 2025, averaging 17.8 papers a year. Output peaked at 54 publications in 2024. 98 of the 426 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 2002 to 2025. Vertical axis: number of publications, 0 to 54. Peak 54 publications in 2024. 2002: 4 publications 2003: 13 publications 2004: 7 publications 2005: 4 publications 2006: 10 publications 2007: 8 publications 2008: 12 publications 2009: 34 publications 2010: 26 publications 2011: 22 publications 2012: 18 publications 2013: 21 publications 2014: 4 publications 2015: 3 publications 2016: 9 publications 2017: 8 publications 2018: 5 publications 2019: 22 publications 2020: 12 publications 2021: 18 publications 2022: 33 publications 2023: 35 publications 2024: 54 publications 2025: 44 publications
2002 2025

426 publications in total across all disciplines

View publications per year as a table
Chee Kong Yap: publications per year, 2002 to 2025
Year Publications
2002 4
2003 13
2004 7
2005 4
2006 10
2007 8
2008 12
2009 34
2010 26
2011 22
2012 18
2013 21
2014 4
2015 3
2016 9
2017 8
2018 5
2019 22
2020 12
2021 18
2022 33
2023 35
2024 54
2025 44
Total 426
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Chee Kong Yap publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Chee Kong Yap sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 291–300 publications, is where this scientist sits. 41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 282 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 295 publications — 85th percentile

85% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155
281–290 130
291–300 127 295
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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Chee Kong Yap D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Chee Kong Yap sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 198 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 20 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125 D-Index: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 39 D-Index — 15th percentile

15% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275 39
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
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Overview

Chee Kong Yap is affiliated with Universiti Putra Malaysia in Malaysia and has a research focus centered within the field of Environmental Science. Their academic output includes a substantial number of publications, with a specialization in subfields such as Pollution, Health, Toxicology and Mutagenesis, Ecology, Plant Science, and Water Science and Technology.

The scientist's research topics cover a range of environmental and ecological concerns, focusing heavily on contamination and toxicology. Key topics in their work include:

  • Heavy metals in environment
  • Mercury impact and mitigation studies
  • Environmental Toxicology and Ecotoxicology
  • Microplastics and Plastic Pollution
  • Heavy Metal Exposure and Toxicity
  • Reproductive biology and impacts on aquatic species
  • Water Quality and Pollution Assessment

Their recent publications illustrate this scope, including:

  • "A Commentary on the Use of Bivalve Mollusks in Monitoring Metal Pollution Levels", 2021, published in International Journal of Environmental Research and Public Health
  • "Copper and Zinc Levels in Commercial Marine Fish from Setiu, East Coast of Peninsular Malaysia", 2022, published in Toxics

Chee Kong Yap collaborates frequently with a number of researchers, including:

  • Rosimah Nulit
  • Khalid Awadh Al-Mutairi
  • Wan Hee Cheng
  • Mohamad Saupi Ismail
  • AHMAD DWI SETYAWAN

They have contributed to publications in a variety of academic venues, with repeated appearances in journals such as:

  • International Journal of Hydrology
  • MOJ Biology and Medicine
  • International Journal of Environmental Research and Public Health
  • Biology
  • Sustainable Social Development

The research demonstrates a consistent focus on environmental contamination, toxicity assessment, and ecological impacts, with special attention to heavy metals and pollutants in aquatic ecosystems and associated biological effects. The work also extends into the study of water quality, microplastics pollution, and reproductive biology effects on aquatic species.

Best Publications

  • Anthropogenic impacts on the distribution and biodiversity of benthic macroinvertebrates and water quality of the Langat River, Peninsular Malaysia

    M.Z. Azrina;C.K. Yap;A. Rahim Ismail;A. Ismail

  • Anthropogenic impacts on heavy metal concentrations in the coastal sediments of Dumai, Indonesia.

    Bintal Amin;Bintal Amin;Ahmad Ismail;Aziz Arshad;Chee Kong Yap

  • Correlations between speciation of Cd, Cu, Pb And Zn in sediment and their concentrations in total soft tissue of green-lipped mussel Perna viridis from the west coast of Peninsular Malaysia.

    Chee Kong Yap;Ahmad Ismail;Soon Guan Tan;Hishamuddin Omar

  • Concentrations of Cu and Pb in the offshore and intertidal sediments of the west coast of Peninsular Malaysia.

    C.K Yap;A Ismail;S.G Tan;H Omar

  • Background concentrations of Cd, Cu, Pb and Zn in the green-lipped mussel Perna viridis (Linnaeus) from Peninsular Malaysia.

    C.K Yap;A Ismail;S.G Tan

  • Can the shell of the green-lipped mussel Perna viridis from the west coast of Peninsular Malaysia be a potential biomonitoring material for Cd, Pb and Zn?

    C.K. Yap;A. Ismail;S.G. Tan;I. Abdul Rahim

  • Toxicities and tolerances of Cd, Cu, Pb and Zn in a primary producer (Isochrysis galbana) and in a primary consumer (Perna viridis)

    Chee Kong Yap;Ahmad Ismail;Husaini Omar;Soon Guan Tan

  • Heavy metal (Cd, Cu, Pb and Zn) concentrations in the green-lipped mussel Perna viridis (Linnaeus) collected from some wild and aquacultural sites in the west coast of Peninsular Malaysia

    Chee Kong Yap;Ahmad Ismail;Soon Guan Tan

  • Accumulation, depuration and distribution of cadmium and zinc in the green-lipped mussel Perna viridis (Linnaeus) under laboratory conditions

    C. K. Yap;A. Ismail;S. G. Tan;H. Omar

  • Potential human health risks from toxic metals via mangrove snail consumption and their ecological risk assessments in the habitat sediment from Peninsular Malaysia

    Wan Hee Cheng;Chee Kong Yap

  • Health risk assessments of heavy metal exposure via consumption of marine mussels collected from anthropogenic sites

    Chee Kong Yap;Wan Hee Cheng;Ali Karami;Ahmad Ismail

  • First report of bioaccumulation and bioconcentration of aliphatic hydrocarbons (AHs) and persistent organic pollutants (PAHs, PCBs and PCNs) and their effects on alcyonacea and scleractinian corals and their endosymbiotic algae from the Persian Gulf, Iran: Inter and intra-species differences.

    Ali Ranjbar Jafarabadi;Alireza Riyahi Bakhtiari;Mansour Aliabadian;Hédouin Laetitia

  • Distributions and compositional patterns of polycyclic aromatic hydrocarbons (PAHs) and their derivatives in three edible fishes from Kharg coral Island, Persian Gulf, Iran

    Ali Ranjbar Jafarabadi;Alireza Riyahi Bakhtiari;Zeinab Yaghoobi;Chee Kong Yap

  • Population dynamics of the green mussel Perna viridis from the high spat-fall coastal water of Malacca, Peninsular Malaysia

    S.M. Al-Barwani;A. Arshad;S.M. Nurul Amin;S.B. Japar

  • Cd and Zn concentrations in the straits of Malacca and intertidal sediments of the west coast of Peninsular Malaysia.

    Chee Kong Yap;Ahmad Ismail;Soon Guan Tan

  • Assessment of Cu, Pb, and Zn contamination in sediment of north western Peninsular Malaysia by using sediment quality values and different geochemical indices.

    Chee Kong Yap;Bin Huan Pang

  • Prevention Is Better Than Cure: Persian Gulf Biodiversity Vulnerability to the Impacts of Desalination Plants

    Moslem Sharifinia;Zahra Afshari Bahmanbeigloo;Walker O. Smith;Walker O. Smith;Chee Kong Yap

  • Assessment of Different Soft Tissues of the Green-lipped Mussel Perna viridis (Linnaeus) as Biomonitoring Agents of Pb: Field and Laboratory Studies

    C. K. Yap;A. Ismail;S. G. Tan;A. Rahim Ismail

  • Use of different soft tissues of Perna viridis a s biomonitors of bioavailability and contamination by heavy metals (Cd, Cu, Fe, Pb, Ni, and Zn) in a semi-enclosed intertidal water, the Johore Straits

    Chee Kong Yap;Ahmad Ismail;Franklin Berandah Edward;Soon Guan Tan

  • Risk assessment for the daily intake of polycyclic aromatic hydrocarbons from the ingestion of cockle (Anadara granosa) and exposure to contaminated water and sediments along the west coast of Peninsular Malaysia.

    Seiedeh Aghileh Mirsadeghi;Mohamad Pauzi Zakaria;Chee Kong Yap;Azadeh Shahbazi

  • Gastropod Assemblages as Indicators of Sediment Metal Contamination in Mangroves of Dumai, Sumatra, Indonesia

    Bintal Amin;Bintal Amin;Ahmad Ismail;Aziz Arshad;Chee Kong Yap

  • Interspecific Variation of Heavy Metal Concentrations in the Different Parts of Tropical Intertidal Bivalves

    Franklin Berandah Edward;Chee Kong Yap;Ahmad Ismail;Soon Guan Tan

Frequent Co-Authors

Mohamad Pauzi Zakaria
Mohamad Pauzi Zakaria University of Malaya
Ahmad Fauzi Ismail
Ahmad Fauzi Ismail University of Technology Malaysia
Ahmad Zaharin Aris
Ahmad Zaharin Aris Universiti Putra Malaysia
Walker O. Smith
Walker O. Smith Shanghai Jiao Tong University
Stuart L. Simpson
Stuart L. Simpson Commonwealth Scientific and Industrial Research Organisation
Frank A. P. C. Gobas
Frank A. P. C. Gobas Simon Fraser University
James M. Lazorchak
James M. Lazorchak Environmental Protection Agency
Mohd Talib Latif
Mohd Talib Latif National University of Malaysia

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